Systems for bioagent identification

ABSTRACT

The present invention provides systems and methods for analysis of samples, particularly biological and environmental sample to detect biomolecules of interest contained therein. A variety of system components are described herein, including, but not limited to, components for sample handling, mixing of materials, sample processing, transfer of materials, and analysis of materials. The invention further provides mechanisms for combining and integrating the different components and for housing, moving, and storing system components or the system as a whole. The systems may include any one or more or all of these components. The system finds particular use when employed for analysis of nucleic acid molecule using mass spectrometry, however, the invention is not limited such specific uses.

CROSS REFERENCE TO RELATED APPLICATIONS

The present application is a continuation of U.S. patent application Ser. No. 12/837,191 filed Jul. 15, 2010, which claims priority to PCT Patent Application No. PCT/US2010/042159 filed Jul. 16, 2010 and U.S. Provisional Application Ser. No. 61/226,537 filed Jul. 17, 2009, the entirety of each of which is herein incorporated by reference.

FIELD OF THE INVENTION

The present invention provides systems and methods for analysis of samples, particularly biological and environmental sample to detect biomolecules of interest contained therein. A variety of system components are described herein, including, but not limited to, components for sample handling, mixing of materials, sample processing, transfer of materials, and analysis of materials. The invention further provides mechanisms for combining and integrating the different components and for housing, moving, and storing system components or the system as a whole. The systems may include any one or more or all of these components. The system finds particular use when employed for analysis of nucleic acid molecule using mass spectrometry, however, the invention is not limited such specific uses.

BACKGROUND OF THE INVENTION

Nucleic acid amplification techniques, such as the polymerase chain reaction (PCR) have widespread applications in many scientific disciplines, including microbiology, medical research, forensic analysis, and clinical diagnostics. In some of these applications, PCR products are “sized” using traditional biochemical techniques such as standard gel electrophoresis involving either intercalating dyes or fluorescently labeled primers. Other applications, such as 5′-nuclease or TaqMan® probe-based assays, which are widely used in a number of PCR-related diagnostic kits, confirm the presence (or absence) of a specific PCR product, but provide no direct information on the size of the particular amplicon. These methods typically have limited utility for relatively small amplicons (less than 150 base pairs), owing to the proportionately high fluorescence background, and do not provide any information with respect to amplicon heterogeneity or exact length.

Electrospray ionization mass spectrometry (ESI-MS) has become an important technique for the analysis of biopolymers, including nucleic acids. Compared to the more traditional nucleic acid analysis methods mentioned above, ESI-MS as a platform on which to characterize PCR products typically provides improved speed, sensitivity, and mass accuracy, among other attributes. Further, since the exact mass of each nucleotide or nucleobase is known with great accuracy, a high-precision mass measurement obtained via mass spectrometry can be used to derive a base composition within the experimentally obtained mass measurement uncertainty. In certain applications, the base compositions of PCR products are used to identify unknown bioagents, genotype nucleic acids, and provide drug resistance profiles as well as other information about the corresponding template nucleic acids or source organisms.

In the electrospray ionization process, large charged droplets are produced in the process of “pneumatic nebulization” where the analyte solution is forced through a needle at the end of which is applied a potential sufficient to disperse the emerging solution into a very fine spray of charged droplets all of which have the same polarity. The solvent evaporates, shrinking the droplet size and increasing the charge concentration at the droplet's surface. Eventually, at the Rayleigh limit, Coulombic repulsion overcomes the droplet's surface tension and the droplet explodes. This “Coulombic explosion” forms a series of smaller, lower charged droplets. The process of shrinking followed by explosion is repeated until individually charged analyte ions are formed. The charges are statistically distributed amongst the analyte's available charge sites, leading to the possible formation of multiply charged ions. Increasing the rate of solvent evaporation, by introducing a drying gas flow counter current to the sprayed ions, increases the extent of multiple-charging. Decreasing the capillary diameter and lowering the analyte solution flow rate, e.g., in nanospray ionization, typically creates ions with higher mass-to-charge (m/z) ratios (i.e., it is a softer ionization technique) than those produced by “conventional” ESI and are commonly used in the field of bioanalysis.

ESI generally requires relatively clean samples and is intolerable of cationic salts, detergents, and many buffering agents commonly used in biochemical laboratories. Buffer systems commonly employed in polymerase chain reactions, for example, typically include electrospray incompatible reagents such as KCl, MgCl₂, Tris-HCl, and each of the four deoxynucleotide triphosphates (dNTPs). Even the presence of relatively low concentrations of metal cations (e.g., less than 100 μM) can reduce MS sensitivity for oligonucleotides as the signal for each molecular ion is spread out over multiple salt adducts. Thus, in addition to removing detergents and dNTPs, effective ESI-MS of PCR products typically requires that the salt concentration be reduced by more than a factor of 1000 prior to analysis.

Ethanol precipitation has been used to desalt PCR products for subsequent MS analysis as short oligonucleotides and salts are removed while the sample is concentrated. In some of these methods, the PCR product can be precipitated from concentrated ammonium acetate solutions, either overnight at 5° C. or over the course of 10-15 minutes with cold (−20° C.) ethanol. Unfortunately, a precipitation step alone is generally insufficient to obtain PCR products which are adequately desalted to obtain high-quality ESI spectra; consequently, precipitation is generally followed by a dialysis step to further desalt the sample. While several approaches have successfully employed these methods to characterize a number of PCR products, there remains a need to apply these and related methods in a robust and fully automated high-throughput manner.

SUMMARY OF THE INVENTION

The present invention provides systems and methods for analysis of samples, particularly biological and environmental sample to detect biomolecules of interest contained therein. A variety of system components are described herein, including, but not limited to, components for sample handling, mixing of materials, sample processing, transfer of materials, and analysis of materials. The invention further provides mechanisms for combining and integrating the different components and for housing, moving, and storing system components or the system as a whole. The systems may include any one or more or all of these components. The system finds particular use when employed for analysis of nucleic acid molecule using mass spectrometry, however, the invention is not limited such specific uses.

The present invention provides cartridges that are useful in mixing materials, including fluidic materials. Typically, the fluidic materials include particles, such as magnetically responsive beads, cells, solid supports, or the like, which are maintained in suspension using the cartridges described herein. In some embodiments, the cartridges are consumable or disposable components of mixing stations. Optionally, fluid mixing stations are included as components of systems. To illustrate, in certain embodiments, the cartridges described herein are used to maintain substantially homogenous mixtures including magnetically responsive beads, which are utilized in systems that perform nucleic acid purification and detection. In addition, the invention also provides related kits and methods.

In one aspect, the invention provides a cartridge for mixing material (e.g., fluidic material, etc.). The cartridge includes at least one body structure comprising one or more surfaces that define a cavity having upper and lower portions. The cartridge also includes at least one rotatable member extending at least partially along an axis that is substantially horizontally disposed in the upper portion of the cavity. The rotatable member is configured to operably connect to a rotational mechanism. In addition, the cartridge also includes at least one protrusion extending outward from the rotatable member and into the lower portion of the cavity. The protrusion is configured to mix the material when the material is disposed in the cavity, the rotatable member is operably connected to the rotational mechanism, and the rotational mechanism at least partially rotates the rotatable member about the axis.

The cartridges described herein include various embodiments. In certain embodiments, for example, cartridges are included as components of the mixing stations, kits, and/or systems described herein.

Typically, the cavity lacks substantial dead zones, e.g., areas where particles tend to fall out of suspension. In some embodiments, the upper portion of the cavity comprises at least one hole or indentation that receives at least a section of the rotatable member. In certain embodiments, the cavity comprises a volume capacity of about 500 mL or less.

In some embodiments, the body structures of the cartridges of the invention comprise one or more dimensions selected from, e.g., a height of about 10 cm or less, a width of about 15 cm or less, and a length of about 20 cm or less. In certain embodiments, the body structure comprises a weight of about 1 kg or less. Typically, the body structure is dimensioned to be handheld. Also, in some embodiments, the body structure, the rotatable member, the protrusion, or any combination thereof are disposable. In certain embodiments, the body structure comprises at least one alignment feature configured to align the cartridge relative to a cartridge support structure of a cartridge receiver/rotation assembly, when the cartridge is positioned on the cartridge support structure of the cartridge receiver/rotation assembly. In addition, in some embodiments, the body structure comprises at least one retention component configured to engage at least one retention mechanism of a cartridge receiver/rotation assembly, when the cartridge is positioned on a cartridge support structure of the cartridge receiver/rotation assembly.

The rotatable members of the cartridges described herein are typically configured to rotate about 180 degrees or less within the cavities of the cartridges. In some embodiments, rotatable members are configured to operably connect to the rotational mechanism via a substantially vertically disposed side surface of the body structure. To further illustrate, the rotatable member optionally comprises at least a first magnetic coupler that is configured to interact with at least a second magnetic coupler of the rotational mechanism to effect rotation of the rotatable member when the first and second magnetic couplers are within magnetic communication with one another and the rotational mechanism effects rotation of the second magnetic coupler.

In some embodiments, the protrusion of the cartridges described herein comprises at least one paddle or at least on blade. Optionally, the protrusion is fabricated integral with the rotatable member. Typically, the rotatable member comprises a plurality of protrusions.

In some embodiments, the cavity is fully enclosed within the body structure. In some of these embodiments, an aperture is disposed through a top surface of the body structure. The aperture is generally configured to receive a fluid handling component that fluidly communicates with the cavity. Typically, the aperture is disposed through the top surface of the body structure relative to the rotatable member and to the protrusion such that the fluid handling component does not contact the rotatable member or the protrusion when the rotatable member rotates the protrusion and the aperture receives the fluid handling component. In certain embodiments, a closure is disposed in or over the aperture. In some embodiments, the closure comprises a septum. In certain embodiments, the closure is re-sealable.

In other embodiments, a top surface of the body structure comprises an opening that communicates with the cavity. In some of these embodiments, a sealing member is operably connected to the body structure. The sealing member is generally structured to substantially seal the opening. In some embodiments, the sealing member comprises a removable cover that is structured to engage at least one surface of the body structure. Optionally, the sealing member comprises a film that overlays the opening on the top surface of the body structure. In certain embodiments, the film comprises a heat sealed film. Optionally, the film comprises an adhesive. Typically, an aperture is disposed through the sealing member. The aperture is generally configured to receive a fluid handling component such that the fluid handling component can fluidly communicate with the cavity. In some embodiments, the aperture is disposed through the sealing member relative to the rotatable member and to the protrusion such that the fluid handling component does not contact the rotatable member or the protrusion when the rotatable member rotates the protrusion and the aperture receives the fluid handling component. In some embodiments, a closure is disposed in or over the aperture. In certain embodiments, the closure comprises a septum. In some embodiments, the closure is re-sealable.

In certain embodiments, a fluidic material is disposed in the cavity. In these embodiments, the fluidic material typically comprises particles. To further illustrate, the particles are optionally selected from, e.g., cells, biopolymers, and solid supports. In some embodiments, the particles are maintained in suspension within the fluidic material when the rotatable member is operably connected to the rotational mechanism and the rotational mechanism at least partially rotates the rotatable member about the axis. Optionally, the particles comprise magnetically responsive particles (e.g., magnetically responsive beads, etc.).

In some embodiments, at least a first surface of the body structure is substantially symmetrical about the axis of the cavity. In these embodiments, a distance between a lower portion of the protrusion and the first surface of the cavity is typically substantially identical at two or more positions about the axis of the cavity. In some embodiments, the first surface of the cavity is curved. For example, a radius of curvature of the first surface of the cavity optionally varies along the length of the cavity. In certain embodiments, a radius of curvature of the first surface of the cavity is larger at a central portion of the cavity than the radius of curvature near an end portion of the cavity.

In some embodiments, the rotatable member comprises a proximal end which extends through a hole or an indentation in a surface of the cavity. Typically, the proximal end is configured to operably connect to the rotational mechanism. In certain embodiments, at least one washer is disposed around the proximal end of the rotatable member to seal the hole or indentation in the surface of the cavity. In some embodiments, there is a projection that extends outward from the rotatable member. The projection is typically configured to activate a motion sensor when the motion sensor is in sensory communication with the projection and the rotatable member is rotated.

In certain embodiments, the protrusion comprises at least one substantially vertically disposed segment that extends downward from the rotatable member and at least one substantially laterally disposed segment that extends outward from the substantially vertically disposed segment. In some embodiments, the substantially laterally disposed segment comprises an edge having a textured surface that, for example, enhances the uniform mixing of materials in a cartridge cavity relative to a protrusion lacking such an edge.

In another aspect, the invention provides a mixing station that includes at least one cartridge that comprises at least one body structure comprising one or more surfaces that define a cavity having upper and lower portions. The cartridge also comprises at least one rotatable member extending at least partially along an axis that is substantially horizontally disposed in the upper portion of the cavity, and at least one protrusion extending outward from the rotatable member and into the lower portion of the cavity. In addition, the mixing station also includes a cartridge receiver/rotation assembly that comprises at least one cartridge support structure that supports the body structure of the cartridge, and a rotational mechanism operably connected to the rotatable member. In some embodiments, the mixing station includes a thermal modulating component within thermal communication of the cavity to modulate temperature of fluidic material when the fluidic material is disposed in the cavity. Typically, the cartridge is removable from the cartridge support structure. In some embodiments, the body structure comprises at least one retention component. In these embodiments, the cartridge receiver/rotation assembly typically comprises at least one retention mechanism that engages the retention component to retain the cartridge on the cartridge support structure of the cartridge receiver/rotation assembly. In certain embodiments, the rotatable member comprises at least a first magnetic coupler. In these embodiments, the rotational mechanism comprises at least a second magnetic coupler that magnetically communicates with the first magnetic coupler to effect rotation of the rotatable member when the rotational mechanism rotates the second magnetic coupler. In some embodiments, the rotational mechanism comprises a motor. Typically, the rotational mechanism is mounted on the cartridge support structure. In certain embodiments, the cartridge receiver/rotation assembly comprises at least one controller operably connected at least to the rotational mechanism. The controller is typically configured to selectively direct the rotational mechanism to rotate the rotatable member in an initiation mode or in a maintenance mode in which a rate of rotation of the rotatable member is greater in the initiation mode than in the maintenance mode.

In some embodiments, the cartridge receiver/rotation assembly comprises a motion sensor that is configured to sense motion of the rotatable member when the rotational mechanism rotates the rotatable member. In these embodiments, a projection typically extends outward from the rotatable member. The projection is generally configured to activate the motion sensor when the rotatable member is rotated.

In certain embodiments, the mixing station includes at least one detection component in sensory communication with the cavity. The detection component is typically configured to detect one or more parameters of a fluidic material when the fluidic material is disposed in the cavity. In some embodiments, for example, the parameters are selected from, e.g., pH, temperature, pressure, density, salinity, conductivity, fluid level, radioactivity, luminescence, fluorescence, phosphorescence, and the like.

Optionally, the cartridge support structure comprises a recessed region that receives at least part of the body structure. In some embodiments, the recessed region comprises at least one groove. In these embodiments, the body structure typically comprises at least one alignment feature that is received within the groove to align the cartridge relative to the cartridge support structure of the cartridge receiver/rotation assembly.

In another aspect, the invention provides a kit that includes at least one cartridge that comprises at least one body structure comprising one or more surfaces that define a cavity having upper and lower portions. The cartridge also includes at least one rotatable member extending at least partially along an axis that is substantially horizontally disposed in the upper portion of the cavity. In addition, the cartridge further includes at least one protrusion extending outward from the rotatable member and into the lower portion of the cavity. The kit also includes at least one fluidic material and/or at least one particle disposed in the cavity and/or in at least one separate container. The kit further includes instructions for mixing the fluidic material and/or the particle in the cartridge and/or loading the fluidic material and/or the particle into the cavity of the cartridge. Typically, the kit also includes packaging for containing the cartridge, the separate container, and/or the instructions. To illustrate, the fluidic material generally includes water, a buffer, a cell culture medium, or the like. In some embodiments, the particle comprises at least one magnetically responsive particle. In certain embodiments, the particle is a cell, a biopolymer, a solid support, or the like.

In another aspect, the invention provides a system that includes at least one mixing station that comprises a cartridge. The cartridge includes at least one body structure comprising one or more surfaces that define a cavity having upper and lower portions. The cartridge also includes at least one rotatable member extending at least partially along an axis disposed in the upper portion of the cavity. In addition, the cartridge also includes at least one protrusion extending outward from the rotatable member and into the lower portion of the cavity. The mixing station also includes at least one cartridge receiver/rotation assembly that comprises at least one cartridge support structure that supports the body structure of the cartridge, and a rotational mechanism operably connected to the rotatable member. The system also includes at least one additional system component selected from, e.g., at least one nucleic acid amplification component, at least one sample preparation component, at least one microplate handling component, at least one material transfer component, at least one sample processing component, at least one mass spectrometer, at least one controller, at least one database, and/or the like.

In another aspect, the invention provides a method of mixing a fluidic material. The method includes (a) providing a cartridge that comprises at least one body structure comprising one or more surfaces that define a cavity having upper and lower portions, at least one rotatable member extending at least partially along an axis that is substantially horizontally disposed in the upper portion of the cavity, at least one protrusion extending outward from the rotatable member and into the lower portion of the cavity, and the fluidic material disposed in the cavity. The method also includes (b) rotating the rotatable member to cause the protrusion to agitate the fluidic material to thereby mix the fluidic material. In some embodiments, (b) comprises rotating the rotatable member back-and-forth about 180 degrees or less within the cavity. Typically, the method includes adding and/or removing material to and/or from the cavity. In some embodiments, one or more particles are disposed within the fluidic material and (b) maintains the particles in suspension within the fluidic material. In certain embodiments, (b) includes (i) rotating the rotatable member in an initiation mode to suspend the particles within the fluidic material, and (ii) rotating the rotatable member in an maintenance mode to maintain the particles in suspension within the fluidic material in which a rate of rotation of the rotatable member is greater in the initiation mode than in the maintenance mode.

In another aspect, the invention provides a method of fabricating a cartridge. The method includes (a) forming at least one body structure comprising one or more surfaces that define a cavity having upper and lower portions and (b) forming at least one rotatable member comprising at least one outwardly extending protrusion, which rotatable member is configured to extend at least partially along an axis that is substantially horizontally disposed in the upper portion of the cavity. The method also includes (c) coupling the rotatable member to the body structure such that the protrusion extends into the lower portion of the cavity.

In another aspect, the invention provides a method that includes (a) receiving an order from a customer for at least one cartridge that comprises at least one body structure comprising one or more surfaces that define a cavity having upper and lower portions, at least one rotatable member extending at least partially along an axis that is substantially horizontally disposed in the upper portion of the cavity, and at least one protrusion extending outward from the rotatable member and into the lower portion of the cavity. The method also includes (b) supplying the cartridge to the customer in response to the order. Optionally, (a) comprises receiving the order via a personal appearance by the customer or an agent thereof, via a postal or other delivery service, via a telephonic communication, or via an email communication or another electronic medium. In some embodiments, (a) comprises receiving the order for a kit that comprises the cartridge. In certain embodiments, (b) comprises supplying the cartridge to the customer via a personal appearance by the customer or an agent thereof, or via a postal or other delivery service.

The present invention provides microplate handling systems that are useful in handling or managing microplates in essentially any microplate-based application. Typically, these systems include microplate storage units that store multiple stacked microplates. These storage units generally function as input and/or output points for microplates introduced into and/or taken out of the systems of the invention. In certain embodiments, for example, batches of microplates (e.g., non-priority microplates) are stored in input microplate storage units in a user-selected order or sequence. The microplate handling systems of the invention also provide mechanisms for readily introducing priority or stat samples for processing ahead of other samples. Typically, these samples are introduced into the systems of the invention at any point in a given processing application via priority microplate storage units of the systems. In addition to computer program products useful in managing microplate-based processes and hardware in the systems of the invention, and related methods are also provided.

In one aspect, the invention provides a microplate handling system. The system includes at least first and second non-priority microplate storage units that each store two or more microplates; at least one priority microplate storage unit that stores at least one microplate; and at least one microplate processing area. The system also includes at least one non-priority microplate holding area; at least one microplate transport mechanism configured to transport one or more microplates between the first and second non-priority microplate storage units, the priority microplate storage unit, the microplate processing area, and/or the non-priority microplate holding area; and at least one controller operably connected at least to the microplate transport mechanism. In some embodiments, the controller is configured to selectively direct the microplate transport mechanism to carry out one or more or all of: (a) transport a non-priority microplate from the first non-priority microplate storage unit to the microplate processing area; (b) position the non-priority microplate while in the microplate processing area; (c) transport the non-priority microplate from the microplate processing area to the non-priority microplate holding area when a priority microplate is stored in the priority microplate storage unit; (d) transport the priority microplate from the priority microplate storage unit to the microplate processing area; (e) position the priority microplate while in the microplate processing area; (f) transport the priority microplate from the microplate processing area to the second non-priority microplate storage unit or to the priority microplate storage unit; (g) transport the non-priority microplate from the non-priority microplate holding area to the microplate processing area; and (h) transport the non-priority microplate from the microplate processing area to the second non-priority microplate storage unit. Typically, the controller is configured to selectively direct the microplate transport mechanism to execute (c) prior to (d) and/or (f) prior to (g).

The first and second non-priority microplate storage units each typically store two or more stacked microplates (e.g., in vertically stacked orientations). In some embodiments, for example, the first and second non-priority microplate storage units each comprise a support structure that defines a cavity that is configured to store two or more stacked microplates. In these embodiments, at least a lower surface of the support structure generally comprises an opening that communicates with the cavity in which dimensions of the opening are sufficient to accommodate microplates moving into or out of the cavity. Typically, at least one retaining mechanism is operably connected to the support structure. The retaining mechanism is generally configured to reversibly retain at least one microplate in the cavity.

In some embodiments, the priority microplate storage unit comprises a support structure that defines a cavity that is configured to store the microplate. In certain of these embodiments, at least a lower surface of the support structure comprises an opening that communicates with the cavity in which dimensions of the opening accommodate microplates moving into or out of the cavity. Typically, at least one retaining mechanism is operably connected to the support structure. The retaining mechanism is generally configured to reversibly retain at least one microplate in the cavity. In some embodiments, at least one movement mechanism (e.g., a sliding mechanism or the like) is operably connected to the support structure. In these embodiments, the movement mechanism is typically configured to move the support structure relative to the first and second non-priority microplate storage units.

In certain embodiments, a microplate handling system includes a support base on which the first and second non-priority microplate storage units, the priority microplate storage unit, the microplate processing area, and the non-priority microplate holding area are disposed. The non-priority microplate holding area typically comprises at least one non-priority microplate holding component that is structured to hold one or more non-priority microplates above the support base. To further illustrate, in certain embodiments, at least the first and second non-priority microplate storage units are detachable from the support base. In these embodiments, the first and/or second non-priority microplate storage unit typically comprises a handle, e.g., to facilitate transport of the unit to and from the system.

The microplate transport mechanism of a microplate handling system includes various embodiments. In some embodiments, for example, the microplate transport mechanism comprises at least one platform (e.g., a nest or the like) that is structured to support one or more microplates; at least a first linear motion component operably connected to the platform, which first linear motion component selectively moves the platform along a first axis; and at least a second linear motion component operably connected to the platform, which second linear motion component selectively moves the platform along a second axis. Typically, the first linear motion component is configured to selectively raise and lower the platform. In certain embodiments, the first linear motion component comprises a stepper motor. Typically, the second linear motion component is configured to selectively move the platform between the first non-priority microplate storage unit, the second non-priority microplate storage unit, the priority microplate storage unit, the microplate processing area, and/or the non-priority microplate holding area. In some embodiments, for example, the second linear motion component is configured to move the platform beneath the first non-priority microplate storage unit, the second non-priority microplate storage unit, and the priority microplate storage unit. In certain embodiments, the second linear motion component comprises at least one gantry. In some embodiments, the second linear motion component comprises at least one encoder and at least one stepper motor.

Typically, the microplate handling systems of the invention include additional system components, or themselves are included as components or sub-systems of other systems. In some embodiments, for example, microplate handling systems include at least one barcode reader or radio frequency identification (RFID) reader configured to read barcodes or radio frequency tags disposed on microplates when the microplates are disposed in or proximal to the first non-priority microplate storage unit, the second non-priority microplate storage unit, the priority microplate storage unit, the microplate processing area, and/or the non-priority microplate holding area. Other automatic identification and data capture (AIDC) technologies are also optionally utilized. To further illustrate, in certain embodiments, microplate handling systems include at least one material transfer component configured to transfer material to and/or from selected wells disposed in at least one microplate when the microplate is disposed in the microplate processing area. In these embodiments, the material transfer component is typically configured to transfer fluidic material. Typically, the material transfer component includes at least one gantry, and in certain embodiments, the material transfer component comprises at least one gantry head (e.g., includes one or more needles). In some of these embodiments, microplate handling systems include at least one magnetically responsive particle source. The material transfer component is generally configured to aspirate an aliquot of magnetically responsive particles from the magnetically responsive particle source prior to or after aspirating an aliquot of material from a selected well of the microplate when the microplate is disposed in the microplate processing area. In addition, in some of these embodiments, microplate handling systems include at least one wash station configured to wash the material transfer component or a portion thereof. In certain of these embodiments, microplate handling systems include at least one sample processing component (e.g., a desalting station or the like) in which the material transfer component is configured to transfer the material from the selected wells disposed in the microplate to the sample processing component.

In another aspect, the invention provides a microplate storage unit that includes a support structure that defines a cavity that is configured to store two or more stacked microplates. The support structure comprises a top end and a bottom end. The microplate storage unit also includes a base structure operably connected to the bottom end of the support structure. An opening is disposed through the base structure and communicates with the cavity and dimensions of the opening are sufficient to accommodate microplates moving into or out of the cavity. Further, the base structure is configured to detachably engage a support base of a microplate handling system. The microplate storage unit also includes at least one retaining mechanism operably connected to the support structure and/or to the base structure. The retaining mechanism is configured to reversibly retain at least one microplate in the opening and/or in the cavity. In addition, the microplate storage unit also includes at least one handle that is pivotally attached to the support structure and/or to the base structure. The handle pivots between an open position and a closed position in which the top end of the support structure accommodates microplates moving into or out of the cavity when the handle is in the open position. In certain embodiments, at least one alignment member operably connected to at least one surface of the support structure. The alignment member is configured to align microplates when the microplates are disposed in the cavity. Optionally, the microplate storage unit includes a cover member that is configured to cover microplates when the microplates are disposed in the cavity.

In certain embodiments, the handle comprises a swing arm having ends that are pivotally attached to the base structure. In some of these embodiments, the ends of the swing arm extend through the base structure and are configured to align the base structure relative to the support base of the microplate handling system, when the handle is in the closed position and the support structure engages the support base of the microplate handling system. In other exemplary embodiments, one or more slots are disposed in or through the support structure and wherein the swing arm comprises one or more sliding members that slide in the slots.

In another aspect, the invention relates to a computer program product that includes a computer readable medium having one or more logic instructions for directing a microplate transport mechanism of a microplate handling system to carry out one or more or all of: (a) transport a non-priority microplate from a first non-priority microplate storage unit of the microplate handling system to a microplate processing area of the microplate handling system; (b) position the non-priority microplate while in the microplate processing area; (c) transport the non-priority microplate from the microplate processing area to a non-priority microplate holding area of the microplate handling system when a priority microplate is stored in a priority microplate storage unit of the microplate handling system; (d) transport the priority microplate from the priority microplate storage unit to the microplate processing area; (e) position the priority microplate while in the microplate processing area; (f) transport the priority microplate from the microplate processing area to a second non-priority microplate storage unit of the microplate handling system or to the priority microplate storage unit; (g) transport the non-priority microplate from the non-priority microplate holding area to the microplate processing area of the microplate handling system; and (h) transport the non-priority microplate from the microplate processing area to the second non-priority microplate storage unit. In some embodiments, the computer readable medium comprises one or more logic instructions for directing a material transfer component to transfer material to and/or from selected wells disposed in at least one microplate when the microplate is positioned in the microplate processing area. Optionally, the computer readable medium comprises one or more logic instructions for directing a barcode reader or radio frequency identification (RFID) reader of the microplate handling system to read barcodes or radio frequency tags disposed on microplates when the microplates are disposed in or proximal to the first non-priority microplate storage unit, the second non-priority microplate storage unit, the priority microplate storage unit, the microplate processing area, and/or the non-priority microplate holding area. Typically, the logic instructions are configured to direct the microplate transport mechanism to execute (c) prior to (d) and/or (f) prior to (g). In some embodiments, a controller of the microplate handling system comprises the logic instructions. In certain of these embodiments, the controller comprises or is operably connected to a database comprising one or more microplate descriptors.

In another aspect, the invention provides a method of handling a priority microplate in a microplate handling system. The method includes one or more or all of the steps of: (a) placing the priority microplate in a priority microplate storage unit of the microplate handling system; (b) transporting a first non-priority microplate from a microplate processing area of the microplate handling system to a non-priority microplate holding area of the microplate handling system using a microplate transport mechanism of the microplate handling system; and (c) placing the first non-priority microplate onto a non-priority microplate holding component disposed in the non-priority microplate holding area using the microplate transport mechanism. In addition, the method also includes (d) transporting the priority microplate from the priority microplate storage unit to the microplate processing area using the microplate transport mechanism; (e) transferring material to and/or from one or more selected wells of the priority microplate using a material transfer component of the microplate handling system, and (f) transporting the priority microplate from the microplate processing area to a second non-priority microplate storage unit of the microplate handling system or to the priority microplate storage unit using the microplate transport mechanism, thereby handling the priority microplate in the microplate handling system. In some embodiments, one or more wells of the priority microplate comprise nucleic acid molecules. In these embodiments, the method typically comprises amplifying one or more target regions of the nucleic acid molecules prior to (a). Typically, the method includes transporting the first non-priority microplate from a first non-priority microplate storage unit of the microplate handling system to the microplate processing area using the microplate transport mechanism prior to (b). In some embodiments, the method includes removing material from one or more selected wells of the first non-priority microplate using the material transfer component prior to (b).

In certain embodiments, the method includes loading a plurality of non-priority microplates in a selected order into the first non-priority microplate storage unit. In some of these embodiments, one or more wells of the plurality of non-priority microplates comprise nucleic acids and the method comprises amplifying one or more target regions of the nucleic acids prior to loading the plurality of non-priority microplates into the first non-priority microplate storage unit.

In some embodiments, the method includes transporting the first non-priority microplate from the non-priority microplate holding area to the microplate processing area using the microplate transport mechanism. Typically, the method includes transferring material to and/or from one or more selected wells of the first non-priority microplate using the material transfer component. In some of these embodiments, the method includes transporting the first non-priority microplate from the microplate processing area to the second non-priority microplate storage unit using the microplate transport mechanism. In certain embodiments, the method includes transporting a second non-priority microplate from the first non-priority microplate storage unit to the microplate processing area using the microplate transport mechanism. To further illustrate, in some embodiments, the material transfer component comprises one or more needles and the method comprises aspirating one or more aliquots of magnetically responsive particles into the needles from a magnetically responsive particle source prior to or after transferring the material from the selected wells of the first non-priority microplate. In these embodiments, the material typically comprises a fluidic material and the method comprises aspirating one or more aliquots of the fluidic material into the needles from the selected wells of the first non-priority microplate. In some of these embodiments, the method includes transferring the aliquots of magnetically responsive particles and fluidic material to a container of a sample processing station to form a mixture in which the magnetically responsive particles capture at least a first component of the mixture. These embodiments typically also include moving and/or retaining the magnetically responsive particles proximal to a surface of the container using a magnetic field and removing at least a second component of the mixture from the container. Typically, the method includes eluting the captured first component from the magnetically responsive particles and detecting a molecular mass of the first component. In certain of these embodiments, the first component comprises a nucleic acid molecule and the method comprises determining a base composition of the nucleic acid molecule from the molecular mass of the nucleic acid molecule.

The material transfer component typically comprises one or more needles and the method comprises aspirating one or more aliquots of magnetically responsive particles into the needles from a magnetically responsive particle source prior to (e). In some of these embodiments, the material comprises a fluidic material and (e) comprises aspirating one or more aliquots of the fluidic material into the needles from the selected wells of the priority microplate. In certain of these embodiments, the method includes transferring the aliquots of magnetically responsive particles and fluidic material to a container of a sample processing station to form a mixture in which the magnetically responsive particles capture at least a first component of the mixture. In these embodiments, the method typically includes moving and/or retaining the magnetically responsive particles proximal to a surface of the container using a magnetic field and removing at least a second component of the mixture from the container. Typically, in these embodiments, the method includes eluting the captured first component from the magnetically responsive particles and detecting a molecular mass of the first component. In some of these embodiments, the first component comprises a nucleic acid molecule and the method comprises determining a base composition of the nucleic acid molecule from the molecular mass of the nucleic acid molecule.

The present invention provides sample processing units that are useful in various purification processes. In certain embodiments, for example, the sample processing units are used to perform solution capture methods of purifying nucleic acids, which are subsequently analyzed using any suitable approach, including electrospray mass spectrometric-based analysis. Some of these embodiments include adding an anion exchange resin to the solution and mixing these materials in a sample processing unit to yield a suspension of the anion exchange resin in the solution in which the nucleic acids bind to the anion exchange resin. Additional processing steps performed using the sample processing units described herein typically include isolating the anion exchange resin from the solution, washing the anion exchange resin to remove one or more contaminants with one or more wash buffers while retaining the nucleic acids bound to the resin, and eluting the nucleic acids from the anion exchange resin with an elution buffer, thereby yielding purified nucleic acids that are suitable for further analysis. In addition to sample processing units and stations, the invention also provides related systems and methods.

In one aspect, the invention provides a sample processing unit that includes at least one container (e.g., a cuvette or the like) configured to contain at least one sample comprising at least one magnetically responsive particle (e.g., a magnetically responsive bead coated with a selected capture reagent, etc.), and at least one magnet (e.g., a permanent magnet, an electromagnet, etc.) that generates, or is configured to generate, at least one magnetic field, which magnet is in a substantially fixed position relative to the container. The sample processing unit also includes at least one conveyance mechanism configured to convey the container between at least first and second positions in which at least the first position is within magnetic communication with the magnet when the magnet generates the magnetic field, and at least one rotational mechanism operably connected to the container, which rotational mechanism is configured to rotate the container when the container is in at least the second position. Typically, the sample processing unit includes at least one mounting bracket that is operably connected to one or more of: the container, the magnet, the conveyance mechanism, or the rotational mechanism. In some embodiments, a sample processing station includes the sample processing unit. In certain embodiments, a carrier mechanism includes the sample processing unit. In some of these embodiments, a system includes the carrier mechanism.

In some embodiments, the conveyance mechanism comprises at least one motor. The conveyance mechanism is configured to rotate the container between the first and second positions in certain embodiments. In other exemplary embodiments, the conveyance mechanism is configured to slide the container between the first and second positions. To further illustrate, in some embodiments, the conveyance mechanism comprises at least one support member operably connected to the container and/or to the rotational mechanism. In some of these embodiments, the support member is configured to slide between the first and second positions, whereas in other exemplary embodiments, the support member is configured to rotate between the first and second positions.

In certain embodiments, the rotational mechanism is configured to rotate the container in at least one pulsed mode, during which a substantial portion of the time of rotation, a rate of rotation of the container exceeds a rate of rotation of the sample when the container contains the sample such that the sample is sheared away from a surface of the container. In some embodiments, the rotational mechanism is configured to rotate the container in at least one oscillating motion.

In another aspect, the invention provides a sample processing unit that includes at least one cuvette configured to contain at least one sample comprising at least one magnetically responsive particle, and at least one magnet (e.g., a permanent magnet, an electromagnet, etc.) that generates, or is configured to generate, at least one magnetic field, which magnet is in a substantially fixed position. In some embodiments, two or more magnets are disposed proximal to a receiving space in which the cuvette is located at least partially within the receiving space when the cuvette is in the first position. The sample processing unit also includes at least a first motor operably connected to the cuvette. The first motor is configured to rotate the cuvette around a central longitudinal axis of the cuvette. In addition, the sample processing unit also includes at least one support member (e.g., a swing arm or the like) operably connected to the first motor, and at least a second motor operably connected to the support member. The second motor is configured to rotate the cuvette between at least first and second positions in which at least the first position is within magnetic communication with the magnet when the magnet generates the magnetic field. In certain embodiments, a sample processing station includes the sample processing unit. Optionally, a carrier mechanism (e.g., a carousel, a conveyor track, etc.) includes the sample processing unit. In some of these embodiments, a system includes the carrier mechanism.

In some embodiments, the first motor (e.g., a stepper motor, a servo motor, etc.) is configured to rotate the cuvette in at least one pulsed mode, during which a substantial portion of the time of rotation, a rate of rotation of the cuvette exceeds a rate of rotation of the sample when the cuvette contains the sample such that the sample is sheared away from a surface of the cuvette, e.g., to effect thorough mixing of the sample and other materials that may be present in the cuvette. To further illustrate, the first motor is optionally configured to rotate the cuvette in at least one oscillating motion. In certain embodiments, the second motor comprises a brushless direct current motor or the like. The sample processing unit generally includes circuitry configured to control the first and second motors.

In certain embodiments, the support member comprises a first end and a second end in which the cuvette is retained at or proximal to the first end of the support member, and in which the second motor is operably connected to the support member at or proximal to the second end of the support member. In some of these embodiments, the support member is configured to rotate at least partially around a rotational axis extending through the second end of the support member. As a further illustrate, in some embodiments, a pin is fixedly coupled to the second end of the support member and aligned with the rotational axis in which the pin is operably coupled to the second motor.

In some embodiments, the sample processing unit includes a mounting bracket in which the support member is operably connected to the mounting bracket. In certain of these embodiments, the magnet is operably connected to the mounting bracket.

In another aspect, the invention provides a sample processing system. The system includes at least one sample processing unit that comprises: at least one cuvette configured to contain at least one sample comprising at least one magnetically responsive particle; at least one magnet that generates, or is configured to generate, at least one magnetic field, which magnet is in a substantially fixed position; at least a first motor operably connected to the cuvette, which first motor is configured to rotate the cuvette around a central longitudinal axis of the cuvette; at least one support member operably connected to the first motor; and at least a second motor operably connected to the support member, which second motor is configured to rotate the cuvette between at least first and second positions in which at least the first position is within magnetic communication with the magnet when the magnet generates the magnetic field. The system also includes at least one carrier mechanism operably connected to the sample processing unit. The carrier mechanism is configured to move the sample processing unit to one or more locations. The system further includes at least one material transfer component configured to transfer material to and/or from the cuvette, and at least one controller operably connected to the sample processing unit, the carrier mechanism, and/or the material transfer component. The controller is configured to effect one or more of: the magnet to generate the magnetic field, the first motor to rotate the cuvette, the second motor to rotate the cuvette between the first and second positions, the carrier mechanism to move the sample processing unit to the one or more locations, or the material transfer component to transfer the material to and/or from the cuvette.

The carrier mechanism includes various embodiments. In one embodiment, for example, the carrier mechanism comprises a carousel that is configured to rotate the sample processing unit to the one or more locations. In another exemplary embodiment, the carrier mechanism comprises a conveyor track that is configured to convey the sample processing unit to the one or more locations. Typically, the carrier mechanism comprises a plurality of sample processing units. In some of these embodiments, the material transfer component comprises a manifold that is configured to transfer material to and/or from the cuvettes of at least two sample processing units substantially simultaneously.

In some embodiments, the material transfer component comprises one or more of: a sample input gantry head, a sample wash station, a sample output gantry head, or a cuvette wash station. Typically, the material transfer component is configured to transfer fluidic material. In certain embodiments, the material transfer component comprises one or more needles.

In certain embodiments, the controller is configured to effect the first motor to rotate the cuvette in one or more selectable modes. In some embodiments, for example, the controller is configured to effect the first motor to rotate the cuvette in at least one pulsed mode, during which a substantial portion of the time of rotation, a rate of rotation of the cuvette exceeds a rate of rotation of the sample when the cuvette contains the sample such that the sample is sheared away from a surface of the cuvette. In other exemplary embodiment, the controller is configured to effect the first motor to rotate the cuvette in at least one oscillating motion.

In some embodiments, the sample processing system includes at least one detector configured to detect one or more detectable signals of or from one or more sample components. In certain embodiments, the detector is within sensory communication with the cuvette when the carrier mechanism moves the sample processing unit to at least one of the locations. Optionally, the material transfer component is configured to transfer the material from the cuvette to the detector. In some embodiments, the controller is operably connected to the detector. In these embodiments, the controller is configured to effect the detector to detect the detectable signals of or from the sample components. To further illustrate, in certain embodiments, the detector comprises a mass spectrometer. In some of these embodiments, the mass spectrometer comprises an electrospray ionization time-of-flight mass spectrometer.

In another aspect, the invention relates to a method of processing a sample. The method includes (a) providing at least one sample processing unit that comprises: at least one cuvette that contains at least one sample comprising at least one magnetically responsive particle comprising at least one captured first component (e.g., a biopolymer, such as a polynucleotide, a polypeptide, or the like); at least one magnet that is in a substantially fixed position; at least a first motor operably connected to the cuvette, which first motor is configured to rotate the cuvette around a central longitudinal axis of the cuvette; at least one support member operably connected to the first motor; and at least a second motor operably connected to the support member, which second motor is configured to rotate the cuvette between at least first and second positions in which the magnet is capable of magnetically communicating with the cuvette when the cuvette is at least in the first position. The method also includes (b) moving the cuvette into the first position using the second motor such that a magnetic field generated by the magnet causes the magnetically responsive particle to move and/or be retained proximal to a surface of the cuvette. In addition, the method also includes (c) removing at least a second component from the cuvette to thereby process the sample. In some embodiments, the method includes adding the sample and/or the magnetically responsive particle to the cuvette prior to (a) when the cuvette is in the second position. Optionally, the method includes adding at least one wash reagent to the cuvette. In certain embodiments, the magnet comprises a permanent magnet. In other exemplary embodiments, the magnet comprises an electromagnet. In these embodiments, the method typically comprises generating the magnetic field prior to or during (b). Typically, a carrier mechanism comprises the sample processing unit and the method comprises moving the sample processing unit to one or more locations.

The magnetically responsive particle includes various embodiments. In some embodiments, for example, the magnetically responsive particle comprises an anion exchange resin. Typically, the magnetically responsive particle comprises at least one biopolymer capture reagent. In certain embodiments, the biopolymer capture reagent comprises at least one anion exchange functional group. The anion exchange functional group typically comprises a pKa value of 9.0 or greater. To further illustrate, exemplary anion exchange functional groups are selected from, e.g., a primary amine, a second amine, a tertiary amine, a quaternary amine, a polyethyleneimine, a charged aromatic amine, a diethylaminomethyl, a diethylaminoethyl.

The method typically includes rotating the cuvette using the first motor such that sample components mix with one another. In some embodiments, the method includes rotating the cuvette when the cuvette is in the second position. In certain embodiments, the method includes rotating the cuvette in at least one pulsed mode, during which a substantial portion of the time of rotation, a rate of rotation of the cuvette exceeds a rate of rotation of the sample such that the sample is sheared away from a surface of the cuvette. Optionally, the method includes rotating the cuvette in at least one oscillating motion.

In certain embodiments, the method includes detecting at least one detectable signal of or from the sample. For example, the method optionally includes detecting a molecular mass of the first component. In these embodiments, the molecular mass is generally detected using a mass spectrometer. In some of these embodiments, the first component comprises a nucleic acid and the method comprises correlating the molecular mass of the nucleic acid with a base composition and/or an identity of the nucleic acid.

The present invention provides ionization probe assemblies that are useful in spraying and ionizing sample materials. Typically, the ionization probe assemblies are configured to substantially continuously introduce sample materials into ion source housings of molecular mass measurement systems via multiple probes that are individually configured to discontinuously spray or otherwise introduce sample materials into the ion source housings. In some embodiments, for example, probes of the ionization probe assemblies are configured to duty cycle between spray and rinse positions that are substantially electrically isolated from one another. In addition to ionization probe assemblies, the invention also provides related molecular mass measurement systems, computer program products, and methods.

In one aspect, the invention provides an ionization probe assembly that includes at least one probe mounting structure and at least one probe that is movably coupled to the probe mounting structure. The probe is configured to discontinuously introduce sample aliquots into an ion source housing. In addition, the ionization probe assembly also includes at least one probe conveyance mechanism operably connected to the probe. The probe conveyance mechanism is configured to convey the probe between at least a first position and at least a second position. The first position is substantially electrically isolated from the second position. In some embodiments, an electrospray ion source housing includes the ionization probe assembly. In these embodiments, a mass spectrometer typically includes the electrospray ion source housing. In certain embodiments, at least one cavity is disposed in or proximal to the probe mounting structure. The cavity typically comprises the second position. In some of these embodiments, the cavity fluidly communicates with at least one outlet. Typically, the ionization probe assembly includes at least two probes that are each movably coupled to the probe mounting structure. In these embodiments, the probes are generally independently movably coupled to the probe mounting structure.

The probe mounting structures include various embodiments. In certain embodiments, for example, the probe mounting structure includes at least one view port. In some embodiments, at least one cover operably connected to the probe mounting structure. In certain embodiments, the probe mounting structure comprises an ion source housing back plate that is configured to operably connect to an ion source housing. In these embodiments, the ion source housing back plate typically comprises at least one alignment feature that is structured to align the ion source housing back plate relative to the ion source housing when the ion source housing back plate operably connects to the ion source housing. In some embodiments, at least a first mounting component is operably connected to the probe mounting structure. The first mounting component is configured to engage at least a second mounting component that is operably connected to an ion source housing when the probe mounting structure is mounted on the ion source housing. Typically, the first and second mounting components comprise hinge and/or latch components. In certain embodiments, the probe mounting structure comprises an ion source housing. In some of these embodiments, the ion source housing comprises at least one view port.

Typically, at least one channel is disposed through a length of the probe. In addition, the probe generally comprises at least one sprayer needle that fluidly communicates with the channel. In some embodiments, at least one nebulizer gas source and/or nebulizer gas sheath fluidly communicates with the channel.

In some embodiments, the ionization probe assembly includes at least one thermal modulator operably connected to the probe. The thermal modulator is typically configured to modulate a temperature of the probe. In certain embodiments, for example, the thermal modulator comprises a nebulizer gas heater. Typically, at least one controller circuit board operably connected to the thermal modulator.

In certain embodiments, the ionization probe assembly includes at least two probes independently that are movably coupled to the probe mounting structure. Typically, each probe is movably coupled to the probe mounting structure via a pivot mechanism. In some embodiments, the probe conveyance mechanism comprises at least one motor operably connected to at least one of the pivot mechanisms via a pulley and belt drive assembly. Optionally, each probe is configured to move between a spray position and a rinse position in which the spray position is substantially electrically isolated from the rinse position. In certain embodiments, at least one cavity is disposed in or proximal to the probe mounting structure. The cavity generally comprises at least one of the rinse positions. In these embodiments, the cavity typically fluidly communicates with at least one outlet.

In some embodiments, the probe is movably coupled to the probe mounting structure via a slide mechanism. Typically, the slide mechanism comprises at least two probes. In some of these embodiments, the probes are substantially fixedly coupled to the slide mechanism. In certain embodiments, the first position comprises a spray position and the second position comprises at least first and second rinse positions that are each substantially electrically isolated from the spray position. Typically, when a first probe is in the spray position, a second probe is in the second rinse position, and when the second probe is in the spray position, the first probe is in the first rinse position. In some of these embodiments, the slide mechanism comprises a probe support plate coupled to the probe mounting structure via a linear slide, and the probe is mounted on the probe support plate. In certain embodiments, the probe conveyance mechanism comprises a dual acting pneumatic cylinder operably connected to the probe mounting structure and to the probe support plate.

In another aspect, the invention provides an ionization probe assembly that includes at least one ion source housing back plate that comprises one or more surfaces that define at least one spray orifice. The ion source housing back plate is configured to operably connect to an ion source housing. The ionization probe assembly also includes at least one rinse cavity that is at least partially disposed within the ion source housing back plate in which the rinse cavity communicates with the spray orifice via at least one opening. Typically, the rinse cavity fluidly communicates with at least one outlet. In addition, the ionization probe assembly also includes at least one probe support structure coupled to the ion source housing back plate via at least one linear slide, and at least one probe substantially fixedly mounted on the probe support structure. The ionization probe assembly also includes at least one probe conveyance mechanism operably connected to the probe support structure. The probe conveyance mechanism is configured to selectively convey the probe support structure such that the probe slides between the spray orifice and the rinse cavity through the opening.

In another aspect, the invention provides an ionization probe assembly that includes at least one ion source housing back plate that comprises one or more surfaces that define at least one spray orifice. The ion source housing back plate is configured to operably connect to an ion source housing. The ionization probe assembly also includes at least one rinse cavity that is at least partially disposed within the ion source housing back plate in which the rinse cavity communicates with the spray orifice via at least one opening, and at least one probe movably coupled to the ion source housing back plate via at least one pivot mechanism. In addition, the ionization probe assembly also includes at least one probe conveyance mechanism that comprises at least one motor operably connected to the pivot mechanism via a pulley and belt drive assembly. The probe conveyance mechanism is configured to selectively convey the probe between the spray orifice and the rinse cavity through the opening.

In another aspect, the invention provides a molecular mass measurement system. The system includes at least one mass spectrometer that comprises at least one ion source housing, and at least one ionization probe assembly operably connected to the ion source housing. The ionization probe assembly comprises: at least one probe mounting structure; at least one probe that comprises at least one inlet and at least one outlet in which the inlet fluidly communicates with the outlet, the probe is movably coupled to the probe mounting structure, which probe is configured to discontinuously introduce sample aliquots into the ion source housing; and at least one probe conveyance mechanism operably connected to the probe, which probe conveyance mechanism is configured to convey the probe between a spray position and a rinse position in which the spray position is substantially electrically isolated from the rinse position. The system also includes at least one sample source in fluid communication with the inlet of the probe, and at least one rinse fluid source in fluid communication with the inlet of the probe. In addition, the system also includes at least one controller operably connected at least to the ionization probe assembly. The controller is configured to selectively direct the ionization probe assembly to: (a) convey the probe from the rinse position to the spray position; (b) spray at least one sample aliquot into the ion source housing from the sample source when the probe is in the spray position; (c) convey the probe from the spray position to the rinse position; and (d) rinse the probe with rinse fluid from the rinse fluid source when the probe is in the rinse position. In some embodiments, the system includes at least one additional system component selected from, e.g., at least one nucleic acid amplification component; at least one sample preparation component; at least one microplate handling component; at least one mixing station; at least one material transfer component; at least one sample processing component; at least one database; and the like.

In another aspect, the invention provides a computer program product that includes a computer readable medium having one or more logic instructions for directing an ionization probe assembly of a molecular mass measurement system to: (a) convey a first probe from a first rinse position to a first spray position of the molecular mass measurement system, wherein the first rinse position and the first spray position are substantially electrically isolated from one another; (b) convey a second probe from a second spray position to a second rinse position of the molecular mass measurement system, wherein the second spray position and the second rinse position are substantially electrically isolated from one another; (c) spray at least a first sample aliquot into an ion source housing of the molecular mass measurement system via the first probe when the first probe is in the first spray position; (d) rinse the second probe when the second probe is in the second rinse position; (e) convey the first probe from the first spray position to the first rinse position; (f) convey the second probe from the second rinse position to the second spray position; (g) spray at least a second sample aliquot into the ion source housing of the molecular mass measurement system via the second probe when the second probe is in the second spray position; and, (h) rinse the first probe when the first probe is in the first rinse position. In some embodiments, the computer program product includes at least one logic instruction for directing the ionization probe assembly of the molecular mass measurement system to modulate a temperature of the first probe and/or second probe using at least one thermal modulator operably connected to the first probe and/or second probe. In certain embodiments, the logic instructions are configured to direct the ionization probe assembly to execute (a) substantially simultaneously with (b), (c) substantially simultaneously with (d), (e) substantially simultaneously with (f), and/or (g) substantially simultaneously with (h). Typically, a controller of the molecular mass measurement system comprises the logic instructions.

In another aspect, the invention provides a method of spraying sample aliquots into an ion source housing of a molecular mass measurement system. The method includes (a) conveying a first probe from a first rinse position to a first spray position of the molecular mass measurement system in which the first rinse position and the first spray position are substantially electrically isolated from one another and wherein the first spray position is in fluid communication with the ion source housing; and (b) conveying a second probe from a second spray position to a second rinse position of the molecular mass measurement system, wherein the second spray position and the second rinse position are substantially electrically isolated from one another. The method also includes (c) spraying at least a first sample aliquot into the ion source housing via the first probe when the first probe is in the first spray position; (d) rinsing the second probe when the second probe is in the second rinse position; and (e) conveying the first probe from the first spray position to the first rinse position. In addition, the method also includes (f) conveying the second probe from the second rinse position to the second spray position in which the second spray position is in fluid communication with the ion source housing; (g) spraying at least a second sample aliquot into the ion source housing of the molecular mass measurement system via the second probe when the second probe is in the second spray position; and (h) rinsing the first probe when the first probe is in the first rinse position, thereby spraying the sample aliquots into the ion source housing of the molecular mass measurement system. In certain embodiments, the method includes performing (a) substantially simultaneously with (b), (c) substantially simultaneously with (d), (e) substantially simultaneously with (f), and/or (g) substantially simultaneously with (h).

In some embodiments, the method includes modulating a temperature of the first probe and/or second probe using at least one thermal modulator operably connected to the first probe and/or second probe. Typically, the method includes ionizing the first sample aliquot and the second sample aliquot when the first sample aliquot and the second sample aliquot are sprayed into the ion source housing. The method also generally includes measuring a molecular mass of at least one component of the first sample aliquot and/or the second sample aliquot using the molecular mass measurement system. In some embodiments, the component of the first sample aliquot and/or the second sample aliquot comprises at least one nucleic acid molecule. In these embodiments, the method generally comprises determining a base composition of the nucleic acid molecule from the molecular mass of the nucleic acid molecule. In certain of these embodiments, the method includes correlating the base composition of the nucleic acid molecule with an identity or property of the nucleic acid molecule.

The present invention provides devices, apparatuses, and systems for lifting and mounting of clinical- and research-related equipment. In certain exemplary embodiments, the present invention provides a lift and mount system for mass spectrometers (e.g., for time of flight (TOF) mass spectrometers (MS) of TOF-MS) (see e.g., those devices and components of such devices described in U.S. Pat. Appln. Ser. Nos. 61/152,214, 29/328,150, 29/328,151, 29/330,905, and 29,330,904, herein incorporated by reference in their entireties; see also T5000 device of Ibis Biosciences, Inc.). In some embodiments, the devices, apparatuses, and systems provide a safe and secure scaffold for moving, positioning, mounting, and using a large and/or heave analytical machine.

In some embodiments, the present invention provides a system comprising: (a) an device, wherein the device comprises a biomedical, biophysical, or biochemical device, and (b) an apparatus, wherein the apparatus comprises (i) a mounting assembly and (ii) a structural assembly, wherein the structural assembly comprises a platform member, wherein the mounting assembly is configured to lift the device to a height higher than the height of the platform member, wherein the mounting assembly is configured to retract the device into a position directly above the platform member, wherein the mounting assembly is configured to lower the device onto the platform member, and wherein the structural assembly and the platform member are configured to stably support the device. In some embodiments, the mounting assembly is supported by the structural assembly. In some embodiments, the mounting assembly is located atop the structural assembly. In some embodiments, the mounting assembly comprises a lifting assembly and a retracting assembly.

In some embodiments, the retracting assembly is configured to extend the lifting assembly beyond the front of the structural assembly, and the retracting assembly is configured retract the lifting assembly within the structural assembly and above the platform member. In some embodiments, the lifting assembly comprises one or more device engagement members, wherein the device engagement members extend from the lifting assembly to the device, and wherein the device engagement members are configured to stably engage and support the device. In some embodiments, the device engagement members are configured to retract toward the top of the system, thereby lifting the device. In some embodiments, the lifting assembly is configured to lift the device to a height which is higher than the height of the platform member. In some embodiments, the retracting assembly is configured retract the lifting assembly and the device within the structural assembly and directly above the platform member. In some embodiments, the lifting assembly is configured to extend the device engagement members, thereby setting the device onto the platform member. In some embodiments, the present invention comprises an accessory assembly, wherein the accessory assembly is configured to support one or more accessory devices, wherein the accessory devices are configured to function in conjunction with the device (e.g., in fluid, electronic, or mechanical communication with the device). In some embodiments, the accessory assembly is attached to the structural assembly. In some embodiments, the device comprises a mass spectrometer.

The present invention further provides apparatuses, as described above, lacking the device (e.g., but configured for moving, mounting, or using such a device). In some embodiments, the present invention provides an apparatus comprising: (a) a structural assembly and (b) a mounting assembly, wherein the mounting assembly is located atop the structural assembly and the mounting assembly is supported by the structural assembly, wherein the structural assembly comprises a platform member, wherein the mounting assembly comprises a lifting assembly and a retracting assembly, wherein the lifting assembly is configured to lift the device to a height higher than the height of the platform member, wherein the retracting assembly is configured to retract the lifting assembly and the device into a position directly above the platform member, wherein the lifting assembly is configured to lower the device onto the platform member, and wherein the structural assembly and the platform member are configured to stably support the device. In some embodiments, the device comprises a mass spectrometer. In some embodiments, the lifting assembly comprises a device engagement member.

The present invention further provides methods of moving, positioning, mounting, and using devices. For example, in some embodiments, the present invention provides a method comprising: (a) providing: (i) an apparatus as described in any of the embodiments herein, and (ii) a device, (b) engaging of the device with the device engagement member of the lifting assembly of the apparatus, (c) lifting the device by the lifting assembly of the apparatus, wherein lifting comprises lifting the device to a height wherein the bottom of the device reaches a height higher than the platform member of the apparatus, (d) retracting the device and the lifting assembly by the retracting assembly, wherein retracting results in the device being positioned above the platform member, and (e) lowering the device by the lifting assembly of the apparatus, wherein lowering results in the device being positioned onto the platform member. In some embodiments, the present invention further comprises using the device for its designated purpose. In some embodiments, the device comprises a mass spectrometer.

In some embodiments, the present invention provides a system, comprising one or more of: a) at least one sample container handling component that comprises at least one non-priority sample container storage unit and at least one priority sample container storage unit that each store at least one sample container that is configured to contain one or more samples; b) at least one mixing station that comprises at least one mixing container and at least one mixing mechanism that is configured to mix at least one composition comprising magnetically responsive particles disposed in the mixing container; c) at least one sample processing component that comprises one or more of: i) at least one sample processing unit that comprises: at least one sample processing vessel that is configured to contain at least one sample comprising at least one magnetically responsive particle; at least one magnet that generates, or is configured to generate, at least one magnetic field at least proximal to the sample processing vessel; and ii) at least one carrier mechanism operably connected to the sample processing unit, which carrier mechanism is configured to move the sample processing unit to one or more locations; d) at least one detection component that is configured to detect at least one detectable property of at least one sample component; e) at least one material transfer component that is configured to transfer material to and/or from the sample container handling component, the mixing station, the sample processing component, and/or the detection component; and, f) at least one controller operably connected to, and configured to effect operation of, the sample container handling component, the mixing station, the sample processing component, and/or the detection component.

In some embodiments, the non-priority sample container storage unit and the priority sample container storage unit are each configured to store at least one microplate.

In some embodiments, the sample processing vessel comprises at least one cuvette.

In some embodiments, the magnet is in a substantially fixed position.

In some embodiments, the detection component comprises at least one mass spectrometer.

In some embodiments, the detection component comprises at least one biopolymer sequencing component.

In some embodiments, the system comprises at least one sample preparation component and/or at least one nucleic acid amplification component.

In some embodiments, the system comprises at least one database.

In some embodiments, the system comprising: at least one sample container processing area; at least one non-priority sample container holding area; and, at least one sample container transport mechanism that is configured to transport one or more sample containers between the non-priority sample container storage unit, the priority sample container storage unit, the priority sample container storage unit, the sample container processing area, and/or the non-priority sample container holding area. In some embodiments, the controller is configured to selectively direct the sample container transport mechanism to carry out one or more of: transport a non-priority sample container from the non-priority sample container storage unit to the sample container processing area; position the non-priority sample container while in the sample container processing area; transport the non-priority sample container from the sample container processing area to the non-priority sample container holding area when a priority sample container is stored in the priority sample container storage unit; transport the priority sample container from the priority sample container storage unit to the sample container processing area; position the priority sample container while in the sample container processing area; transport the priority sample container from the sample container processing area to the non-priority sample container storage unit or to the priority sample container storage unit; transport the non-priority sample container from the non-priority sample container holding area to the sample container processing area; and transport the non-priority sample container from the sample container processing area to the non-priority sample container storage unit.

In some embodiments, the mixing container comprises a cartridge that comprises: at least one body structure comprising one or more surfaces that define a cavity having upper and lower portions; at least one rotatable member extending at least partially along an axis that is substantially horizontally disposed in the upper portion of the cavity; and at least one protrusion extending outward from the rotatable member and into the lower portion of the cavity.

In some embodiments, the mixing mechanism comprises at least one cartridge receiver/rotation assembly that comprises: at least one cartridge support structure that supports the body structure of the cartridge; and a rotational mechanism operably connected to the rotatable member.

In some embodiments, the controller is configured to selectively direct the rotational mechanism to rotate the rotatable member in an initiation mode or in a maintenance mode, wherein a rate of rotation of the rotatable member is greater in the initiation mode than in the maintenance mode.

In some embodiments, the sample processing unit comprises: at least a first motor operably connected to the sample processing vessel, which first motor is configured to rotate the sample processing vessel around a central longitudinal axis of the sample processing vessel; at least one support member operably connected to the first motor; and, at least a second motor operably connected to the support member, which second motor is configured to rotate the sample processing vessel between at least first and second positions, wherein at least the first position is within magnetic communication with the magnet when the magnet generates the magnetic field. In some embodiments, the controller is configured to effect one or more of: the magnet to generate the magnetic field, the first motor to rotate the sample processing vessel, the second motor to rotate the sample processing vessel between the first and second positions, the carrier mechanism to move the sample processing unit to the one or more locations, or the material transfer component to transfer the material to and/or from the sample processing vessel. In some embodiments, the controller is configured to effect the first motor to rotate the sample processing vessel in one or more selectable modes.

The present invention further provides a system, comprising: a) a sample processing unit comprising a magnet; b) a container for containing a reagent housed in said sample processing unit; and c) a sample transfer component for transferring reagent from said container to a different region of said sample processing unit; wherein said sample transfer component comprises a channel configured to withdraw reagent from said container, said channel comprising a metal base and a non-metal tip. In some embodiments, the non-metal tip is a plastic or ceramic tip. In some embodiments, the container houses said reagent. In some embodiments, the reagent comprises magnetic particles.

The present invention further provides a system, comprising: a) a reagent housing component configured to house a plurality of reagent containers, said reagent housing component having a capacitive level sensor that measures the level of reagent in said reagent containers, said reagent housing component having an alarm system, said alarm system configured to generate a signal identifying one or more of said reagent containers falling above or below a predetermined threshold level of reagent, said level identify by said capacitive level sensor; b) a sample processing unit configured to process a biological sample using said reagents; c) a reagent transfer mechanism for transferring reagents from one or more of said plurality of reagent containers to said sample processing unit; and d) a housing covering said sample processing unit and at least part of said reagent housing component and said reagent transfer mechanism; said housing having an alarm display that displays a signal on the visible from the outer surface of said housing, said alarm display being triggered if any one or more of said reagent housing components falls above or below said predetermined threshold level. In some embodiments, the alarm system comprises a light located under each of said reagent containers, wherein said lights are configured to identify individual members of said plurality of containers that fall above or below said predetermined threshold level. In some embodiments, alarm display comprises one or more colored lights. In some embodiments, the reagent housing component is removably contained within said housing.

The present invention further provides methods for using any of the system disclosed herein. In some embodiments, such methods comprise: a) providing a system disclosed herein; b) introducing a sample into the system; c) processing the sample using the system to generate data; and d) displaying the data. In some embodiments, the sample is a biological or environmental sample. In some embodiments, the sample comprises one or more pathogenic organisms. In some embodiments, the sample comprises nucleic acid from one or more pathogenic organisms. In some embodiments, the processing comprises amplifying a portion the nucleic acid to generate an amplicon. In some embodiments, the data comprises a mass of said amplicon. In some embodiments, the data comprises a base composition of said amplicon. In some embodiments, the data comprises an identity of an organism associated with said nucleic acid.

BRIEF DESCRIPTION OF THE DRAWINGS

The description provided herein is better understood when read in conjunction with the accompanying drawings which are included by way of example and not by way of limitation. It will be understood that like reference numerals identify like components throughout the drawings, unless the context indicates otherwise. It will also be understood that some or all of the figures may be schematic representations for purposes of illustration and do not necessarily depict the actual relative sizes or locations of the elements shown.

FIG. 1A schematically illustrates a cartridge from a perspective view according to one embodiment of the invention.

FIG. 1B schematically shows the cartridge of FIG. 1A from a top view.

FIG. 1C schematically shows the cartridge of FIG. 1A further including a sealing member from a perspective view.

FIG. 1D schematically illustrates the cartridge of FIG. 1C from a top view.

FIG. 1E schematically depicts the cartridge of FIG. 1C from a transparent top view.

FIG. 1F schematically shows the cartridge of FIG. 1C from a bottom view.

FIG. 1G schematically illustrates the cartridge of FIG. 1C from a transparent bottom view.

FIG. 1H schematically illustrates the cartridge of FIG. 1C from a front elevation view.

FIG. 1I schematically depicts the cartridge of FIG. 1C from a transparent front elevation view.

FIG. 1J schematically illustrates the cartridge of FIG. 1C from a back elevation view.

FIG. 1K schematically shows the cartridge of FIG. 1C from a transparent back elevation view.

FIG. 1L schematically illustrates the cartridge of FIG. 1C from a side elevation view.

FIG. 1M schematically depicts the cartridge of FIG. 1C from a transparent side elevation view.

FIG. 1N schematically shows the cartridge of FIG. 1C from a cross-sectional side elevation view.

FIG. 2A schematically illustrates a cartridge from a perspective view according to one embodiment of the invention.

FIG. 2B schematically shows the cartridge of FIG. 2A from a top view.

FIG. 2C schematically shows components of the cartridge of FIG. 2A from a partially exploded, cross-sectional side elevation view.

FIG. 2D schematically depicts the cartridge of FIG. 2A from a cross-sectional side elevation view.

FIG. 3A schematically shows the rotatable member and protrusions from the cartridge of FIG. 1A from a perspective view.

FIG. 3B schematically shows the rotatable member and protrusions of FIG. 3A from a side elevation view.

FIG. 3C schematically illustrates the rotatable member and protrusions of FIG. 3A from a front elevation view.

FIG. 3D schematically shows the rotatable member and protrusions of FIG. 3A from a back elevation view.

FIG. 3E schematically shows the rotatable member of FIG. 3A from a top view.

FIG. 3F schematically depicts the rotatable member and protrusions of FIG. 3A from a bottom view.

FIG. 3G schematically shows the rotatable member and protrusions of FIG. 3A with a projection attached to the rotatable member from a perspective view.

FIG. 3H schematically illustrates the rotatable member and protrusions of FIG. 3A disposed in a cartridge cavity from a perspective view.

FIG. 4 schematically illustrates a cartridge having magnetic coupler from a partially transparent bottom view according to one embodiment of the invention.

FIG. 5A schematically illustrates a mixing station from a perspective view according to one embodiment of the invention.

FIG. 5B schematically shows the mixing station of FIG. 5A from a side elevation view.

FIG. 5C schematically depicts the mixing station of FIG. 5A from a top view.

FIG. 6A schematically shows the cartridge receiver/rotation assembly of the mixing station of FIG. 5A from a perspective view.

FIG. 6B schematically depicts the cartridge receiver/rotation assembly of the mixing station of FIG. 5A from a top view.

FIG. 6C schematically illustrates the cartridge receiver/rotation assembly of the mixing station of FIG. 5A from a bottom view.

FIG. 6D schematically depicts the cartridge receiver/rotation assembly of the mixing station of FIG. 5A from a side elevation view.

FIG. 6E schematically illustrates the cartridge receiver/rotation assembly of the mixing station of FIG. 5A from a front view.

FIG. 6F schematically shows the cartridge receiver/rotation assembly of the mixing station of FIG. 5A from a back view.

FIG. 7 schematically illustrates a cartridge receiver/rotation assembly of a mixing station that includes a thermal modulating component from a perspective view according to one embodiment of the invention.

FIG. 8 is a block diagram showing a representative logic device in which various aspects of the present invention may be embodied.

FIG. 9A schematically illustrates selected components of a representative system that includes a mixing station as a sub-system component from a perspective view according to one embodiment of the invention.

FIG. 9B schematically shows the representative system of FIG. 9A from a front elevation view.

FIG. 9C schematically depicts the representative system of FIG. 9A from a rear elevation view.

FIG. 9D schematically shows the representative system of FIG. 9A from a side elevation view.

FIG. 9E schematically illustrates the representative system of FIG. 9A from a top elevation view.

FIG. 9F schematically depicts the representative system of FIG. 9A from a cross-sectional view.

FIG. 9G schematically illustrates the representative system of FIG. 9A from a cross-sectional view.

FIG. 10 schematically shows additional components of the representative system of FIG. 9A from a perspective view.

FIG. 11A schematically illustrates the representative system of FIG. 9A with an external covering from a perspective view.

FIG. 11B schematically illustrates the representative system of FIG. 9A with an external covering from a front elevation view.

FIG. 11C schematically shows the representative system of FIG. 9A with an external covering from a side view.

FIG. 12 schematically shows a microplate handling system from a perspective view according to one embodiment of the invention.

FIG. 13A schematically illustrates a microplate storage unit with a handle in an open position from a perspective view according to one embodiment of the invention.

FIG. 13B schematically depicts the microplate storage unit of FIG. 2A with the handle in a partially closed and unlocked position.

FIG. 13C schematically shows the microplate storage unit of FIG. 2A with the handle in a closed and locked position.

FIG. 14 is a block diagram showing a representative logic device in which various aspects of the present invention may be embodied.

FIG. 15A schematically illustrates selected components of a representative system that includes a microplate handling system as a sub-system component from a perspective view according to one embodiment of the invention.

FIG. 15B schematically shows the representative system of FIG. 4A from a front elevation view.

FIG. 15C schematically depicts the representative system of FIG. 4A from a rear elevation view.

FIG. 15D schematically shows the representative system of FIG. 4A from a side elevation view.

FIG. 15E schematically illustrates the representative system of FIG. 4A from a top elevation view.

FIG. 15F schematically depicts the representative system of FIG. 4A from a cross-sectional view.

FIG. 15G schematically illustrates the representative system of FIG. 4A from a cross-sectional view.

FIG. 16 schematically shows additional components of the representative system of FIG. 4A from a perspective view.

FIG. 17A schematically illustrates the representative system of FIG. 4A with an external covering from a perspective view.

FIG. 17B schematically illustrates the representative system of FIG. 4A with an external covering from a front elevation view.

FIG. 17C schematically shows the representative system of FIG. 4A with an external covering from a side view.

FIG. 18 is a flow chart schematically showing the handling and management of microplates in a microplate handling system according to one embodiment of the invention.

FIG. 19A schematically illustrates non-priority microplates stored in an input non-priority microplate storage unit of a microplate handling system from a perspective view according to one embodiment of the invention.

FIG. 19B schematically shows a non-priority microplate positioned in microplate processing area of the microplate handling system of FIG. 8A after being transported from an input non-priority microplate storage unit.

FIG. 19C schematically illustrates a priority microplate stored in a priority microplate storage unit of the microplate handling system of FIG. 8A, while a non-priority microplate is positioned in a microplate processing area of the microplate handling system.

FIG. 19D schematically shows a priority microplate positioned in a microplate processing area of the microplate handling system of FIG. 8A after a non-priority microplate has been transported and positioned in a non-priority microplate holding area of the microplate handling system.

FIG. 19E schematically shows a platform of a microplate transport mechanism in a microplate processing area of the microplate handling system of FIG. 8A after the microplate transport mechanism transported a priority microplate to an output non-priority microplate storage unit.

FIG. 19F schematically depicts a non-priority microplate positioned in a microplate processing area of the microplate handling system of FIG. 8A after a microplate transport mechanism of the microplate handling system transported the non-priority microplate from a non-priority microplate holding area of the microplate handling system.

FIG. 19G schematically shows microplates in an output non-priority microplate storage unit of the microplate handling system of FIG. 8A after all of the microplates have been processed using the microplate handling system.

FIG. 20A schematically illustrates selected components of a representative system that includes a microplate handling system as a sub-system component from a perspective view according to one embodiment of the invention in which a support structure of a priority microplate storage unit of the microplate handling system is shown in an open position.

FIG. 20B schematically depicts the representative system of FIG. 9A from another perspective view in which the support structure of the priority microplate storage unit of the microplate handling system is shown in a closed position.

FIG. 20C schematically depicts the representative system of FIG. 9A from another perspective view in which non-priority microplate storage units have been removed from the microplate handling system.

FIG. 20D schematically shows the representative system of FIG. 9A from a top elevation view in which the support structure of the priority microplate storage unit of the microplate handling system is shown in an open position.

FIG. 20E schematically shows the representative system of FIG. 9A from another top elevation view in which the support structure of the priority microplate storage unit of the microplate handling system is shown in a closed position.

FIG. 20F schematically depicts the representative system of FIG. 9A from a side elevation view in which the support structure of the priority microplate storage unit of the microplate handling system is shown in an open position.

FIG. 20G schematically depicts the representative system of FIG. 9A from a side elevation view in which the support structure of the priority microplate storage unit of the microplate handling system is shown in a closed position.

FIG. 20H schematically shows the representative system of FIG. 9A from a front elevation view.

FIG. 21A schematically shows a sample processing unit with a cuvette in a second position from a perspective view according to one embodiment of the invention.

FIG. 21B schematically depicts the sample processing unit of FIG. 1A with the cuvette in a first position from a perspective view.

FIG. 21C schematically depicts the sample processing unit of FIG. 1A with the cuvette in a first position from a side elevation view.

FIG. 21D schematically illustrates a detailed side elevation view of a motor operably connected to a cuvette of the sample processing unit of FIG. 1A.

FIG. 22A schematically shows a sample processing unit with a cuvette in a first position from a perspective view according to one embodiment of the invention.

FIG. 22B schematically depicts the sample processing unit of FIG. 2A with the cuvette in a second position from a perspective view.

FIG. 23A schematically shows a sample processing unit with a slidable support member in a first position from a front elevation view according to one embodiment of the invention.

FIG. 23B schematically depicts the sample processing unit of FIG. 3A with the slidable support member in a second position from a perspective view.

FIG. 24A schematically illustrates a carrier mechanism with a manifold from a perspective view according to one embodiment of the invention.

FIG. 24B schematically shows the carrier mechanism and manifold of FIG. 4A from a side elevation view.

FIG. 24C schematically shows the carrier mechanism and manifold of FIG. 4A from a top view.

FIG. 24D schematically illustrates a detailed perspective view of the carrier mechanism and manifold of FIG. 4A.

FIG. 24E schematically depicts a detailed side elevation view of the carrier mechanism and manifold of FIG. 4A.

FIG. 24F schematically depicts a detailed front elevation view of the carrier mechanism and manifold of FIG. 4A.

FIG. 25A schematically illustrates a carrier mechanism that includes a conveyor track from a top view according to one embodiment of the invention.

FIG. 25B schematically illustrates the carrier mechanism from FIG. 5A from a side elevation view.

FIG. 26 is a block diagram showing a representative logic device in which various aspects of the present invention may be embodied.

FIG. 27A schematically illustrates selected components of a representative system that includes a sample processing station as a sub-system component from a perspective view according to one embodiment of the invention.

FIG. 27B schematically shows the representative system of FIG. 7A from a front elevation view.

FIG. 27C schematically depicts the representative system of FIG. 7A from a rear elevation view.

FIG. 27D schematically shows the representative system of FIG. 7A from a side elevation view.

FIG. 27E schematically illustrates the representative system of FIG. 7A from a top elevation view.

FIG. 27F schematically depicts the representative system of FIG. 7A from a cross-sectional view.

FIG. 27G schematically illustrates the representative system of FIG. 7A from a cross-sectional view.

FIG. 28 schematically shows additional components of the representative system of FIG. 7A from a perspective view.

FIG. 29A schematically illustrates the representative system of FIG. 7A with an external covering from a perspective view.

FIG. 29B schematically illustrates the representative system of FIG. 7A with an external covering from a front elevation view.

FIG. 29C schematically shows the representative system of FIG. 7A with an external covering from a side view.

FIG. 30 is a mass spectrum obtained for a 65-mer PCR product following a purification and desalting protocol described herein. The two peaks correspond to sense and antisense strands of the PCR amplicons, which separate under the conditions of ESI. Low amplitude salt adducts indicated effective cleanup of the PCR product.

FIG. 31 schematically shows a dual sprayer mounted on a time of flight spectrometer (TOF).

FIG. 32 schematically shows a dual sprayer mounted on a TOF chamber.

FIG. 33 schematically shows an exemplary dual sprayer with two probes mounted on an ion source housing.

FIG. 34a schematically shows an exemplary dual sprayer with the proximal probe in a sprayer position.

FIG. 34b schematically shows an exemplary dual sprayer with the proximal probe in a rinse position.

FIG. 35 schematically shows a cover covering a dual sprayer mounted on an ion source housing.

FIG. 36a schematically shows an exemplary dual sprayer with a mounting structure mounted on an ion source housing.

FIG. 36b schematically shows an exemplary dual sprayer with a mounting structure mounted on an alternative ion source housing.

FIG. 37 schematically shows a dual sprayer probe mounted on a dual sprayer.

FIG. 38 schematically shows a dual sprayer with two probes mounted on a sliding mechanism.

FIG. 39a schematically shows a dual sprayer having a first probe in a first position and a second probe in a second position.

FIG. 39b schematically shows a dual sprayer having a first probe in a second position and a second probe in a first position.

FIG. 40 shows a schematic of an exemplary apparatus in the unmounted conformation.

FIG. 41 shows a schematic of an exemplary apparatus with a mounted TOF-MS.

FIGS. 42A-42B show a schematic of an exemplary apparatus: A) prior to mounting a TOF-MS, and B) with a mounted TOF-MS.

FIGS. 43A-43B show a schematic of the right view of an exemplary apparatus: A) prior to mounting a TOF-MS, and B) with a mounted TOF-MS.

FIGS. 44A-44B show a schematic of the top view of an exemplary apparatus: A) prior to mounting a TOF-MS, and B) with a mounted TOF.

FIG. 45 shows a top perspective view of an exemplary spin cuvette.

FIG. 46 shows a top plan view of an exemplary spin cuvette.

FIG. 47 shows a left side elevational view of an exemplary spin cuvette.

FIG. 48 shows a front elevational view of an exemplary spin cuvette.

FIG. 49 shows a rear elevational view of an exemplary spin cuvette.

FIG. 50 shows an alternate left side elevational view of an exemplary spin cuvette.

FIG. 51 shows one embodiment of an aspirate needle of the present invention.

FIG. 52 shows one embodiment of an integrated bioagent detection system of the present invention. FIG. 52 shows the reagent rack swung forward into a loading position.

FIG. 53 shows one embodiment of an integrated bioagent detection system of the present invention. FIG. 53 shows the reagent rack swung back into a run position.

FIGS. 54A-54C show one embodiments of the signal light of the present invention. FIG. 54A shows the signal light with the translucent cover covering LED lights. FIG. 54B shows the cover removed from the light, showing the internal LED light system.

FIG. 54C shows a close up view of the LED light system, which is composed of 3 roes of 120 degree angle LED's (blue, red, and amber) which has variable intensity for each.

FIG. 55A shows three bottles, with two of the bottle (left and right) being one color to indicate an acceptable reagent level, and the middle bottle being a different color indicating a low level of reagent in this bottle.

FIG. 55B shows a light emitting diodes (LEDs) underneath a reagent bottle such that the color of the reagent bottle can be illuminated to indicate liquid level in the reagent bottle.

DEFINITIONS

Before describing the invention in detail, it is to be understood that this invention is not limited to particular cartridges, mixing stations, systems, kits, or methods, which can vary. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” also include plural referents unless the context clearly provides otherwise. Thus, for example, reference to “a cartridge” includes a combination of two or more cartridge. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting. Further, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. In describing and claiming the invention, the following terminology, and grammatical variants thereof, will be used in accordance with the definitions set forth below.

The term “amplifying” or “amplification” in the context of nucleic acids refers to the production of multiple copies of a polynucleotide, or a portion of the polynucleotide, typically starting from a small amount of the polynucleotide (e.g., a single polynucleotide molecule), where the amplification products or amplicons are generally detectable. Amplification of polynucleotides encompasses a variety of chemical and enzymatic processes. The generation of multiple DNA copies from one or a few copies of a target or template DNA molecule during a polymerase chain reaction (PCR) or a ligase chain reaction (LCR) are forms of amplification. Amplification is not limited to the strict duplication of the starting molecule. For example, the generation of multiple cDNA molecules from a limited amount of RNA in a sample using reverse transcription (RT)-PCR is a form of amplification. Furthermore, the generation of multiple RNA molecules from a single DNA molecule during the process of transcription is also a form of amplification.

The term “base composition” refers to the number of each residue comprised in an amplicon or other nucleic acid, without consideration for the linear arrangement of these residues in the strand(s) of the amplicon. The amplicon residues comprise, adenosine (A), guanosine (G), cytidine, (C), (deoxy)thymidine (T), uracil (U), inosine (I), nitroindoles such as 5-nitroindole or 3-nitropyrrole, dP or dK (Hill F et al. (1998) “Polymerase recognition of synthetic oligodeoxyribonucleotides incorporating degenerate pyrimidine and purine bases” Proc Natl Acad Sci U.S.A. 95(8):4258-63), an acyclic nucleoside analog containing 5-nitroindazole (Van Aerschot et al., Nucleosides and Nucleotides, 1995, 14, 1053-1056), the purine analog 1-(2-deoxy-beta-D-ribofuranosyl)-imidazole-4-carboxamide, 2,6-diaminopurine, 5-propynyluracil, 5-propynylcytosine, phenoxazines, including G-clamp, 5-propynyl deoxy-cytidine, deoxy-thymidine nucleotides, 5-propynylcytidine, 5-propynyluridine and mass tag modified versions thereof, including 7-deaza-2′-deoxyadenosine-5-triphosphate, 5-iodo-2′-deoxyuridine-5′-triphosphate, 5-bromo-2′-deoxyuridine-5′-triphosphate, 5-bromo-2′-deoxycytidine-5′-triphosphate, 5-iodo-2′-deoxycytidine-5′-triphosphate, 5-hydroxy-2′-deoxyuridine-5′-triphosphate, 4-thiothymidine-5′-triphosphate, 5-aza-2′-deoxyuridine-5′-triphosphate, 5-fluoro-2′-deoxyuridine-5′-triphosphate, O⁶-methyl-2′-deoxyguanosine-5′-triphosphate, N²-methyl-2′-deoxyguanosine-5′-triphosphate, 8-oxo-2′-deoxyguanosine-5′-triphosphate or thiothymidine-5′-triphosphate. In some embodiments, the mass-modified nucleobase comprises ¹⁵N or ¹³C or both ¹⁵N and ¹³C. In some embodiments, the non-natural nucleosides used herein include 5-propynyluracil, 5-propynylcytosine and inosine. Herein the base composition for an unmodified DNA amplicon is notated as A_(w)G_(x)C_(y)T_(z), wherein w, x, y and z are each independently a whole number representing the number of said nucleoside residues in an amplicon. Base compositions for amplicons comprising modified nucleosides are similarly notated to indicate the number of said natural and modified nucleosides in an amplicon. Base compositions are calculated from a molecular mass measurement of an amplicon, as described below. The calculated base composition for any given amplicon is then compared to a database of base compositions. A match between the calculated base composition and a single database entry reveals the identity of the bioagent.

The term “communicate” refers to the direct or indirect transfer or transmission, and/or capability of directly or indirectly transferring or transmitting, something at least from one thing to another thing. Objects “fluidly communicate” with one another when fluidic material is, or is capable of being, transferred from one object to another. In some embodiments, for example, an aperture is disposed through a top surface of a cartridge body structure. In these embodiments, the aperture is typically configured to receive a fluid handling component that fluidly communicates with the cavity (e.g., adds and/or removes material to and/or from the cavity). Objects are in “thermal communication” with one another when thermal energy is or can be transferred from one object to another. In certain embodiments, for example, a mixing station includes a thermal modulating component that can transfer thermal energy to and/or receive thermal energy from a cartridge cavity to modulate (e.g., raise and/or lower) temperature of fluidic materials disposed in the cavity. Objects are in “magnetic communication” with one another when one object exerts or can exert a magnetic field of sufficient strength on another object to effect a change (e.g., a change in position or other movement) in the other object. In some embodiments, for example, a rotational mechanism magnetically communicates with a rotatable member of a cartridge via magnetic couplers that effect the rotation of the rotatable member. Objects are in “sensory communication” when a characteristic or property of one object is or can be sense, perceived, or otherwise detected by another object. In certain embodiments, for example, a projection that extends outward from a rotatable member is configured to activate a motion sensor such that movement of the rotatable member can be monitored when the motion sensor is in sensory communication with the projection. To further illustrate, in some embodiments, a detection component is positioned in sensory communication with a cartridge cavity so as to detect one or more parameters (e.g., temperature, pH, or the like) of a fluidic material disposed in the cavity. It is to be noted that there may be overlap among the various exemplary types of communication referred to above.

The phrase “dead zone” in the context of cartridge cavities refers to an area of a cavity in which particles tend to fall out of suspension or otherwise settle even when a fluidic material comprising the particles is agitated or otherwise mixed within the cavity, or to an area of a cavity in which materials are mixed less uniformly or thoroughly than in others within the cavity.

The phrase “horizontally disposed” refers to something that is positioned, and/or operates, in a plane that is parallel to the horizon or to a baseline. In some embodiments, for example, a rotatable member extends at least partially along an axis that is substantially horizontally disposed in the cavity of a cartridge during typical or intended use of the cartridge. An axis is “substantially horizontally disposed” in a cavity when it is either exactly parallel to the horizon or to a baseline, or forms an angle with the horizon or a baseline that is less than 45° (e.g., 40° or less, 35° or less, 30° or less, 25° or less, 20° or less, 15° or less, 10° or less, 5° or less, etc.).

The term “kit” is used in reference to a combination of articles that facilitate a process, method, assay, analysis or manipulation of a sample. Kits can contain instructions describing how to use the kit (e.g., instructions describing the methods of the invention), cartridges, mixing stations, magnetically responsive particles or other particles, chemical reagents, as well as other components. Kit components may be packaged together in one container (e.g., box, wrapping, and the like) for shipment, storage, or use, or may be packaged in two or more containers.

The phrase “laterally disposed” refers to something that extends outward from at least one side of the same or another thing. In some embodiments, for example, a protrusion includes a substantially vertically disposed segment that extends downward from a rotatable member and a substantially laterally disposed segment that extends outward from the substantially vertically disposed segment.

The phrase “lower portion” in the context of a mixing cartridge cavity refers to an area or region of the cavity having a maximum height that is not more than 50% of the maximum height of the entire cavity and which is disposed below another area or region of the cavity during intended operation of the cartridge.

The term “material” refers to something comprising or consisting of matter. The term “fluidic material” refers to material (such as, a liquid or a gas) that tends to flow or conform to the outline of its container.

The term “microplate” refers to a plate or other support structure that includes multiple cavities or wells that are structured to contain materials, such as fluidic materials. The wells typically have volume capacities of less than about 1.5 mL (e.g., about 1000 μL, about 800 μL, about 600 μL, about 400 μL, or less), although certain microplates (e.g., deep-well plates, etc.) have larger volume capacities, such as about 4 mL per well. Microplates can include various numbers of wells, for example, 6, 12, 24, 48, 96, 384, 1536, 3456, 9600, or more wells. In addition, the wells of a microplate are typically arrayed in a rectangular matrix. Microplates generally conform to the standards published by the American National Standards Institute (ANSI) on behalf of the Society for Biomolecular Screening (SBS), namely, ANSI/SBS 1-2004: Microplates—Footprint Dimensions, ANSI/SBS 2-2004: Microplates—Height Dimensions, ANSI/SBS 3-2004: Microplates—Bottom Outside Flange Dimensions, and ANSI/SBS 4-2004: Microplates—Well Positions, which are each incorporated by reference. Microplates are available from a various manufacturers including, e.g., Greiner America Corp. (Lake Mary, Fla., U.S.A.) and Nalge Nunc International (Rochester, N.Y., U.S.A.), among many others. Microplates are also commonly referred to by various synonyms, such as “microtiter plates,” “micro-well plates,” “multi-well containers,” and the like

The term “molecular mass” refers to the mass of a compound as determined using mass spectrometry, for example, ESI-MS. Herein, the compound is preferably a nucleic acid. In some embodiments, the nucleic acid is a double stranded nucleic acid (e.g., a double stranded DNA nucleic acid). In some embodiments, the nucleic acid is an amplicon. When the nucleic acid is double stranded the molecular mass is determined for both strands. In one embodiment, the strands may be separated before introduction into the mass spectrometer, or the strands may be separated by the mass spectrometer (for example, electro-spray ionization will separate the hybridized strands). The molecular mass of each strand is measured by the mass spectrometer.

The term “non-priority microplate” refers to a microplate that is processed or otherwise handled after at least one other microplate, or whose processing or handling is interrupted or deferred in order to process or otherwise handle at least one other microplate, in a given microplate handling system of the invention. That is, the order, schedule, or timing of processing or handling a non-priority microplate is subject to interruption or delay when a higher priority microplate is presented, such as a microplate including stat samples. In some embodiments, non-priority microplates are introduced into a given system via non-priority microplate storage units.

The term “nucleic acid molecule” refers to any nucleic acid containing molecule, including but not limited to, DNA or RNA. The term encompasses sequences that include any of the known base analogs of DNA and RNA including, but not limited to, 4-acetylcytosine, 8-hydroxy-N⁶-methyladenosine, aziridinylcytosine, pseudoisocytosine, 5-(carboxyhydroxyl-methyl)-uracil, 5-fluorouracil, 5-bromouracil, 5-carboxymethylaminomethyl-2-thiouracil, 5-carboxymethyl-aminomethyluracil, dihydrouracil, inosine, N⁶-isopentenyladenine, 1-methyladenine, 1-methylpseudo-uracil, 1-methylguanine, 1-methylinosine, 2,2-dimethyl-guanine, 2-methyladenine, 2-methylguanine, 3-methyl-cytosine, 5-methylcytosine, N⁶-methyladenine, 7-methylguanine, 5-methylaminomethyluracil, 5-methoxy-amino-methyl-2-thiouracil, beta-D-mannosylqueosine, 5′-methoxycarbonylmethyluracil, 5-methoxyuracil, 2-methylthio-N-isopentenyladenine, uracil-5-oxyacetic acid methylester, uracil-5-oxyacetic acid, oxybutoxosine, pseudouracil, queosine, 2-thiocytosine, 5-methyl-2-thiouracil, 2-thiouracil, 4-thiouracil, 5-methyluracil, N-uracil-5-oxyacetic acid methylester, uracil-5-oxyacetic acid, pseudouracil, queosine, 2-thiocytosine, and 2,6-diaminopurine.

The term “priority microplate” refers to a microplate that is processed or otherwise handled before the processing or handling of a non-priority microplate is commenced or completed in a given microplate handling system of the invention. In some embodiments, one or more wells of priority microplates comprise stat or urgent samples. In certain embodiments, priority microplates are introduced into a given system via priority microplate storage units.

The term “system” refers a group of objects and/or devices that form a network for performing a desired objective. In some embodiments, for example, mixing stations with cartridges having fluidic materials with magnetically responsive particles are included as part of systems in which nucleic acids are purified using the magnetically responsive particles such that the molecular masses of the nucleic acids can be more readily detected by mass spectrometers of these systems.

The phrase “upper portion” in the context of a mixing cartridge cavity refers to an area or region of the cavity having a maximum height that is not more than about 65% of the maximum height of the entire cavity and which is disposed above another area or region of the cavity during intended operation of the cartridge.

The phrase “vertically disposed” refers to something that is positioned, and/or operates, in a plane that is perpendicular to the horizon or to a baseline. In certain embodiments, for example, the body structure of a cartridge includes a substantially vertically disposed side surface during typical or intended use of the cartridge. As side surface is “substantially vertically disposed” when it is either exactly perpendicular to the horizon or to a baseline, or forms an angle with the horizon or a baseline that is more than 45° and less than 90° (e.g., between about 50° and about 85°, between about 55° and about 80°, between about 60° and about 75°, between about 65° and about 70°, etc.).

DETAILED DESCRIPTION

The present invention provides systems and methods for analysis of samples, particularly biological and environmental sample to detect biomolecules of interest contained therein. A variety of system components are described herein, including, but not limited to, components for sample handling, mixing of materials, sample processing, transfer of materials, and analysis of materials. The invention further provides mechanisms for combining and integrating the different components and for housing, moving, and storing system components or the system as a whole. The systems may include any one or more or all of these components. The system finds particular use when employed for analysis of nucleic acid molecule using mass spectrometry, however, the invention is not limited such specific uses. Exemplary embodiments of certain of these components is described in more detail below. The invention is not limited to these specific embodiments.

I. Mixing Cartridges

The invention relates to material mixing, and in various embodiments provides cartridges, mixing stations, systems, kits, and related methods that are useful for this purpose. In some applications, for example, fluidic materials are mixed such that particles (e.g., magnetically responsive particles or other solid supports, cells, and the like) are maintained in suspension and uniformly distributed within the fluidic material. In other exemplary applications, different particles are mixed with one another, solid materials are dissolved in liquids, different liquids are mixed with one another or emulsified, and gases are distributed within liquid phases. Homogeneous mixtures of materials are commonly used in a host of scientific and industrial processes, including biopolymer purification procedures, compound screening methods, and chemical synthesis schemes, among many others. The cartridges, mixing stations, and other aspects described herein can be used, or readily adapted for use, in these as well as essentially any other application that involves mixtures of materials. These and many other attributes will be apparent upon reviewing the description provided herein.

A. Example Cartridges

FIGS. 1 A-N schematically illustrate a representative mixing cartridge of the invention. As shown, cartridge 100 includes body structure 102, which includes curved surface 104 that partially defines cavity 106 having upper portion 108 and lower portion 110. As further shown, cartridge 100 also includes rotatable member 112 extending along an axis that is substantially horizontally disposed in upper portion 108 of the cavity 106. In addition, protrusions 114 extend outward from rotatable member 112 and into lower portion 110 of cavity 106, e.g., when rotatable member 112 is not being rotated. Protrusions 114 (shown as a blade or paddle) are configured to mix material when the material (e.g., a fluidic material, etc.) is disposed in cavity 106 and a rotational mechanism rotates rotatable member 112 about the substantially horizontally disposed axis. Suitable rotational mechanisms are described further herein.

Body structures are generally dimensioned to be handheld, although other sizes are also optionally utilized. Handheld cartridges are typically readily transportable (e.g., manually or robotically), e.g., to and from cartridge receiver/rotation assemblies in a given mixing station or system, via a carrier service (e.g., the postal service or the like) as a kit component, or the like. In some embodiments, for example, cartridge body structures have heights of about 10 cm or less (e.g., about 9.5 cm, about 9 cm, about 8.5 cm, about 8 cm, about 7.5 cm, about 7 cm, about 6.5 cm, about 6 cm, about 5.5 cm, about 5 cm, about 4.5 cm, about 4 cm, about 3.5 cm, about 3 cm, about 2.5 cm, etc.). In certain embodiments, cartridge body structures have widths of about 15 cm or less (e.g., about 14.5 cm, about 14 cm, about 13.5 cm, about 13 cm, about 12.5 cm, about 12 cm, about 11.5 cm, about 11 cm, about 10.5 cm, about 10 cm, about 9.5 cm, about 9 cm, about 8.5 cm, about 8 cm, about 7.5 cm, about 7 cm, about 6.5 cm, about 6 cm, about 5.5 cm, about 5 cm, about 4.5 cm, about 4 cm, about 3.5 cm, about 3 cm, about 2.5 cm, etc.). In some embodiments, cartridge body structures have lengths of about 20 cm or less (e.g., about 19.5 cm, about 19 cm, about 18.5 cm, about 18 cm, about 17.5 cm, about 17 cm, about 16.5 cm, about 16 cm, about 15.5 cm, about 15 cm, about 14.5 cm, about 14 cm, about 13.5 cm, about 13 cm, about 12.5 cm, about 12 cm, about 11.5 cm, about 11 cm, about 10.5 cm, about 10 cm, about 9.5 cm, about 9 cm, about 8.5 cm, about 8 cm, about 7.5 cm, about 7 cm, about 6.5 cm, about 6 cm, about 5.5 cm, about 5 cm, about 4.5 cm, about 4 cm, about 3.5 cm, about 3 cm, about 2.5 cm, etc.). In some exemplary embodiments, mixing cartridge body structures include a height of about 3.0 cm (e.g., 3.3 cm, 3.2 cm, 3.1 cm, 3.0 cm, 2.9 cm, 2.8 cm, 2.7 cm, etc.), a width of about 5.5 cm (e.g., 5.8 cm, 5.7 cm, 5.6 cm, 5.5 cm, 5.4 cm, 5.3 cm, 5.2 cm, etc.), and a length of about 12.0 cm (e.g., 12.3 cm, 12.2 cm, 12.1 cm, 12.0 cm, 12.9 cm, 12.8 cm, 12.7 cm, etc.). To further illustrate, mixing cartridge body structures can also include a variety of shapes. In some embodiments, for example, body structures include substantially rectangular-shaped, substantially square-shaped, substantially oval-shaped, and/or substantially circular-shaped cross-sections. In addition, mixing cartridges, or body structures thereof, generally include weights of about 1 kg or less (e.g., about 750 grams, 500 grams, 250 grams, 200 grams, 150 grams, 100 grams, 50 grams, etc.). Cartridge fabrication materials and techniques are described further herein.

The cavities of the mixing cartridges include numerous embodiments. For example, they can include various shapes and volume capacities. A mixing cartridge cavity generally has a shape that lacks substantial dead zones (e.g., areas where particles tend to settle or otherwise not be mixed) when a given rotatable member mixes materials in the cavity. In some embodiments, for example, one or more surfaces of a body structure that define its cavity are substantially symmetrical about a substantially horizontally disposed axis (e.g., an axis about which a rotatable member rotates) of the cavity. Curved surface 104 of cavity 106 illustrate one of these embodiments. Further, a radius of curvature of a surface of a given cavity optionally varies along the length of the cavity in some embodiments. As shown, for example, in FIGS. 1 B and K, the radius of curvature of curved surface 104 of cavity 106 is larger at central portion 116 of cavity 106 than the radius of curvature near end portion 118 of cavity 106. To further illustrate, a distance between a lower portion of a protrusion of a rotatable member and a surface of the cavity is substantially identical at two or more positions about the axis of the cavity in some embodiments. Protrusions 104 and curved surface 104 of cartridge 100 show one of these embodiments. Typically, the upper portions of cavities include holes, indentations, or the like that receive sections of rotatable members, e.g., to position the rotatable members within the cavities. As an example, cavity 106 of cartridge 100 include indentation 120 and hole 122 that receive sections of rotatable member 112. Although mixing cartridge cavities optionally include other volume capacities, they include volume capacities of about 500 mL or less (e.g., about 450 mL, about 400 mL, about 350 mL, about 300 mL, about 250 mL, about 200 mL, about 150 mL, about 100 mL, about 50 mL, etc.).

In certain embodiments, a top surface of the body structure comprises an opening that communicates with the cavity. As shown, for example, in FIGS. 1 A and B, body structure 102 includes opening 124 that communicates with cavity 106. In these embodiments, a mixing cartridge typically includes a sealing member that operably connects to the body structure, e.g., to seal the cavity during operation, transport, or the like. In some embodiments, the sealing member includes a removable cover that is structured to engage one or more surfaces of the body structure. To illustrate, the sealing member optionally includes a film (e.g., a heat sealed or otherwise adhered film) that overlays the opening on the top surface of the body structure. To facilitate communication with the cavity, one or more apertures are generally disposed through the sealing member. In some embodiments, for example, apertures are configured to receive one or more fluid handling components such that the fluid handling components can fluidly communicate with the cavity (e.g., add and/or remove fluidic material to/from the cavity). Fluid handling components are described further below. Typically, an aperture is disposed through the sealing member relative to the rotatable member and to protrusions extending from the rotatable member such that the fluid handling component does not contact the rotatable member or the protrusions when the rotatable member rotates the protrusion and the aperture receives the fluid handling component, e.g., to minimize the chance of damaging these components during operation of a given process. In some embodiments, a closure (e.g., a re-sealable label, a septum, or the like) is disposed in or over the aperture, e.g., to reduce the possibility of contaminating the contents of the cavity, to prevent spillage during transport, to minimize evaporation of fluidic materials in the cavity, etc. In certain embodiments, a closure, such as a sealing label or the like is removed from a cartridge during operation, whereas in other embodiments, a closure such as a self-sealing septum remains positioned in or over an aperture, e.g., when a fluid handling component fluidly communicates with the cavity of the cartridge. To further illustrate, in FIGS. 1 C and D, for example, cartridge 100 includes sealing member 126 (shown as a foil/laminate cover) overlaying opening 124 of cavity 106. Although not within view, for example, in FIGS. 1 C and D, an aperture or fill port is disposed through sealing member 126, but has been covered and sealed by closure 128 (shown as a round seal label).

As also shown, for example, in FIG. 1B, curved surface 104 of cartridge 100 also includes flattened area 105, which aligns with the aperture disposed through sealing member 126 and with closure 128. Flattened areas, such as flattened area 105 are included in certain embodiments to reduce the possibility of a fluid handling component (e.g., a pipette tip or needle) contacting curved surface 104 and causing damage to the fluid handling component and/or cartridge 100, when the fluid handling component fluidly communicates with cavity 106.

In other exemplary embodiments, a cavity is fully enclosed within a mixing cartridge body structure. That is, the body structure does not include an opening comparable to opening 124 in these embodiments. One or more apertures, however, are typically disposed through a top surface of the body structure. In some of these embodiments, for example, the top surface is fabricated integral with the body structure or otherwise attached during assembly. Suitable fabrication techniques and materials are described further herein. The aperture is generally configured to receive a fluid handling component that fluidly communicates with the cavity. In these embodiments, the aperture is typically disposed through the top surface of the body structure relative to the rotatable member and to protrusions extending from the rotatable member such that the fluid handling component does not contact the rotatable member or the protrusions when the rotatable member rotates the protrusions and the aperture receives the fluid handling component. A closure (such as, a re-sealable label, a septum, or the like) is typically disposed in or over the aperture, e.g., at least prior to use. To further illustrate these embodiments, FIGS. 2 A-D schematically show a representative mixing cartridge having a cavity that is fully enclosed. As shown, cartridge 200 includes top surface 202 fabricated integral (e.g., injection molded, machined, or the like) with other portions of the cartridge's body structure. In this exemplary embodiment, cavity portion 204 is fabricated separate from other components of the cartridge (FIG. 2C) and attached to the remaining portion of the body structure (via attachment components 206 (shown as corresponding male and female elements that are structured to engage one another) during device assembly to form cavity 208. As further shown, cartridge 200 includes pre-pierced septum 210 positioned in an aperture disposed through top surface 202. During operation, a fluid handling component (e.g., a manually or robotically operated pipetting apparatus) typically fluidly communicates with cavity 208 via septum 210.

In some embodiments, mixing cartridge body structures include alignment features that align the cartridges relative to other components, such as the cartridge support structure of a cartridge receiver/rotation assembly. To illustrate, cartridge 100 includes alignment features 130, which align cartridge 100 relative to a cartridge support structure when cartridge 100 is positioned on a cartridge receiver/rotation assembly (not shown in FIGS. 1 A-N). In addition, in certain embodiments, body structures also include retention components that engage retention mechanisms of cartridge receiver/rotation assemblies. As shown, cartridge 100 includes retention component 132 (shown as a lip at the base of body structure 102) that engages a retention mechanism of a cartridge receiver/rotation assembly (not shown in FIGS. 1 A-N) to hold cartridge 100 in place when body structure 102 is positioned on the assembly and, e.g., when a rotational mechanism of the assembly rotates rotatable member 112 of cartridge 100. Exemplary cartridge receiver/rotation assemblies are described further herein.

The rotatable members and protrusions of the mixing cartridges of the invention also include a wide variety of embodiments. To further illustrate one exemplary embodiment, FIGS. 3 A-H show additional views of rotatable member 112 and protrusions 114 of cartridge 100. Rotatable members are typically configured to rotate about 180 degrees or less (e.g., about 135 degrees, about 90 degrees, about 45 degrees, etc.) within the cavities of the cartridges described herein. Although rotatable member 112 of cartridge 100 extends along an entire length of a substantially horizontally disposed axis in upper portion 108 of the cavity 106, other configurations are also optionally utilized. In some embodiments, for example, rotatable members extend less than the entire length of a substantially horizontally disposed rotational axis. As an additional option, multiple rotatable members are used in certain embodiments.

Rotatable members are generally configured to operably connect to rotational mechanisms. Rotational mechanisms, which are described further herein, effect the rotation of the rotatable members. In some embodiments, rotatable members operably connect to rotational mechanisms via substantially vertically disposed side surfaces of cartridge body structures. For example, rotatable member 112 includes proximal end 134 that extends through hole 122 in a substantially vertical surface of cavity 106. As also shown, washer 136 is disposed around proximal end 134 of rotatable member 112, e.g., to seal in the surface of cavity 106. Proximal end 134 is configured to operably connect to a rotational mechanism that mechanically effects the rotation of rotatable member 112. Rotatable member rotation can also effected using other approaches. In some embodiments, for example, rotatable members include magnetic couplers that are configured to interact with magnetic couplers of the rotational mechanisms to effect rotation of the rotatable members when the magnetic couplers are within magnetic communication with one another. To illustrate, FIG. 4 schematically shows one embodiment of a cartridge that includes a magnetic coupler from a partially transparent bottom view. As shown, cartridge 400 includes rotatable member 402 disposed within cavity 404. In addition, magnetic coupler 406 is attached to rotatable member 402 and magnetic coupler 408 is rotatably connected to a rotational mechanism (not shown) via shaft 410. During operation, magnetic coupler 406 and magnetic coupler 408 are positioned within magnetic communication with one another such that when the rotational mechanism effects the rotation of magnetic coupler 408, magnetic coupler 408, in turn, effects the rotation of magnetic coupler 406 and rotatable member 402. Magnetic coupling mechanisms that are optionally adapted for use with the cartridges of the invention are also described in, e.g., U.S. Pat. No. 6,461,034, entitled “USE OF A BUBBLE PADDLE TUMBLE STIRRER TO MIX THE CONTENTS OF A VESSEL WHILE THE CONTENTS ARE BEING REMOVED,” which issued Oct. 8, 2002 to Cleveland, which is incorporated by reference in its entirety. Rotational mechanisms and related cartridge receiver/rotation assemblies are described further herein.

Typically, mixing cartridges include mechanisms that facilitate the monitoring and regulation of mixing processes performed using the cartridges. In certain embodiments, for example, there is a projection that extends outward from the rotatable member. In these embodiments, the projection is generally configured to activate a motion sensor when the motion sensor is in sensory communication with the projection and the rotatable member is rotated. As an illustration, projection 138 is positioned in housing 139 near proximal end 134 of rotatable member 112. During operation, the rate of rotatable member 112 rotation is typically tracked and adjusted when a motion sensor detects the motion of projection 138. Motion sensors are typically included as components of cartridge receiver/rotation assemblies, which are described further herein.

The protrusion or protrusions that extend from a given rotatable member also include a number of different embodiments. Essentially any number and configuration of protrusions that can effect the mixing of materials in the cartridges of the invention can be utilized. Typically, protrusions are configured (e.g., in conjunction with cavity surface shapes and/or textures) to minimize dead zones within cavities and to facilitate fluid communication with cartridge cavities concurrent with the rotation of rotatable members. In some embodiments, for example, a protrusion includes at least one substantially vertically disposed segment (e.g., substantially vertically disposed segment 140) that extends downward from the rotatable member (e.g., rotatable member 112) and at least one substantially laterally disposed segment (e.g., substantially laterally disposed segment 142) that extends outward from the substantially vertically disposed segment. In some embodiments, protrusions typically include one or more edges having textured surfaces (e.g., edge 144 of substantially laterally disposed segment 142). The use of textured surfaces typically enhances the uniformity of mixing materials within cartridge cavities. Protrusions are optionally fabricated as separate components and attached to rotatable members during cartridge assembly processes. In other embodiments, protrusions fabricated integral with rotatable members (e.g., as an integrated molded part, etc.). Cartridge fabrication is described further herein.

B. Example Mixing Stations

FIGS. 5 A-C schematically illustrate a mixing station according to one embodiment of the invention. As shown, mixing station 500 includes cartridge 100 (depicted in various transparent views) and cartridge receiver/rotation assembly 502 (shown in various partially transparent views). To further illustrate, FIGS. 6 A-F schematically show cartridge receiver/rotation assembly 502 without cartridge 100. Cartridge receiver/rotation assembly 502 includes cartridge support structure 504 and rotational mechanism 506. Cartridge support structure 504 is structured to position and support cartridge 100, which is removable from cartridge receiver/rotation assembly 502. In some embodiments, cartridges are not removable components of mixing stations, e.g., are fabricated integral with cartridge receiver/rotation assemblies. In certain embodiments, cartridge support structure 504 is attached to or mounted on another support surface via mounting holes 505. As shown, cartridge support structure 504 includes recessed region 508 that receives body structure 102 of cartridge 100. Recessed region 508 includes grooves 510 that receive alignment features 130 of cartridge 100 via notched regions 512 of cartridge receiver/rotation assembly 502 to align cartridge 100 relative to cartridge support structure 504 and rotational mechanism 506 of cartridge receiver/rotation assembly 502. As mentioned above, cartridge 100 includes retention component 132 (shown as a lip at the base of the body structure of cartridge 100). When alignment features 130 of cartridge 100 are received within grooves 510 of cartridge support structure 504, retention component 132 engages retention mechanism 514 (shown as a spring loaded clamp) of cartridge receiver/rotation assembly 502 to reversibly hold cartridge 100 in place within recessed region 508, e.g., to secure cartridge 100 when rotational mechanism 506 rotates rotatable member 112.

As also shown, proximal end 134 of rotatable member 112 of cartridge 100 operably connects to rotational mechanism 506 via rotatable shaft 516. Rotatable shaft 516 is operably connected to motor 518 (shown as a stepper motor), which is mounted on cartridge support structure 504 via motor mounting bracket 520. Motor 518 effects the rotation of rotatable shaft 516 and rotational mechanism 506. As described herein, in other exemplary embodiments, rotatable shaft rotation and material mixing is effected by magnetic coupling mechanisms. For example, as described above with respect to FIG. 4, rotatable members and rotational mechanisms include magnetic couplers that magnetically communicate with one another to effect rotation in some of these embodiments.

As referred to above, mixing stations optionally include mechanisms for monitoring and regulating mixing processes performed using the cartridges described herein. To illustrate, cartridge receiver/rotation assembly 502 of mixing station 500 includes motion sensor 522 (shown as a reflective solder terminal phototransistor) mounted on cartridge support structure 504 via motion sensor mounting bracket 524. Suitable motion sensors are available from a variety of commercial supplier including, e.g., Omron Electronics LLC (Schaumburg, Ill., U.S.A.). During operation, the rotation of rotatable member 112 of cartridge 100 is typically monitored when motion sensor 522 detects the motion of projection 138 within housing 139 of cartridge 100.

In some embodiments, mixing stations include thermal modulating components (e.g., resistive heating coils, or the like) that modulate the temperature of materials disposed in the cavities of mixing cartridges during a given mixing process. For example, FIG. 7 schematically depicts cartridge receiver/rotation assembly 700, which includes heating element 702 disposed in recessed region 704. Heating element 702 is configured to thermally communicate with the cavity of a mixing cartridge to regulate the temperature of materials (e.g., a cell culture suspension, viscous fluidic materials, etc.) within the cavity when the cartridge is positioned within recessed region 704. Although not shown in FIG. 7, heating element 702 operably connects to a power source. Typically, thermal modulating components are operably connected to controllers (described below), e.g., via such power sources.

The controllers of the mixing stations and systems described herein are generally configured to effect, e.g. the rotation of rotatable members to mix materials disposed within the cavities of mixing cartridges, the monitoring of rotatable member rotation, the detection of one or more parameters of materials disposed in mixing cartridge cavities, and the like. Controllers are typically operably connected to one or more system components, such as motors (e.g., via motor drives), thermal modulating components, detectors, motion sensors, fluidic handling components, robotic translocation devices, or the like, to control operation of these components. More specifically, controllers are generally included either as separate or integral system components that are utilized to effect, e.g., the rotation of rotatable members in mixing cartridges according to one or more selectable rotational modes, the transport of mixing cartridges between system areas or components, the transfer of materials to and/or from mixing cartridges, the detection and/or analysis of detectable signals received from sample materials by detectors, etc. Controllers and/or other system components is/are generally coupled to an appropriately programmed processor, computer, digital device, or other logic device or information appliance (e.g., including an analog to digital or digital to analog converter as needed), which functions to instruct the operation of these instruments in accordance with preprogrammed or user input instructions (e.g., mixing mode selection, mixing cartridge cavity temperature, fluid volumes to be conveyed, etc.), receive data and information from these instruments, and interpret, manipulate and report this information to the user.

A controller or computer optionally includes a monitor which is often a cathode ray tube (“CRT”) display, a flat panel display (e.g., active matrix liquid crystal display, liquid crystal display, etc.), or others. Computer circuitry is often placed in a box, which includes numerous integrated circuit chips, such as a microprocessor, memory, interface circuits, and others. The box also optionally includes a hard disk drive, a floppy disk drive, a high capacity removable drive such as a writeable CD-ROM, and other common peripheral elements. Inputting devices such as a keyboard or mouse optionally provide for input from a user. An exemplary system comprising a computer is schematically illustrated in FIG. 8.

The computer typically includes appropriate software for receiving user instructions, either in the form of user input into a set of parameter fields, e.g., in a GUI, or in the form of preprogrammed instructions, e.g., preprogrammed for a variety of different specific operations. The software then converts these instructions to appropriate language for instructing the operation of one or more controllers to carry out the desired operation, e.g., rotating a rotatable member of a mixing cartridge, aspirating fluidic materials from a mixing cartridge, dispensing materials into a cavity of a mixing cartridge, or the like. The computer then receives the data from, e.g., sensors/detectors included within the system, and interprets the data, either provides it in a user understood format, or uses that data to initiate further controller instructions, in accordance with the programming, e.g., such as in monitoring detectable signal intensity, mixing cartridge cavity temperature, or the like.

More specifically, the software utilized to control the operation of the mixing stations of the invention typically includes logic instructions that selectively direct, e.g., the rotational mechanism to rotate the rotatable member in an initiation mode or in a maintenance mode in which a rate of rotation of the rotatable member is greater in the initiation mode than in the maintenance mode. The logic instructions of the software are typically embodied on a computer readable medium, such as a CD-ROM, a floppy disk, a tape, a flash memory device or component, a system memory device or component, a hard drive, a data signal embodied in a carrier wave, and/or the like. Other computer readable media are known to persons of skill in the art. In some embodiments, the logic instructions are embodied in read-only memory (ROM) in a computer chip present in one or more system components, without the use of personal computers.

The computer can be, e.g., a PC (Intel x86 or Pentium chip-compatible DOS™ OS2™, WINDOWS™, WINDOWS NT™, WINDOWS98™, WINDOWS2000™, WINDOWS XP™ WINDOWS Vista™, LINUX-based machine, a MACINTOSH™, Power PC, or a UNIX-based (e.g., SUN™ work station) machine) or other common commercially available computer which is known to one of skill. Standard desktop applications such as word processing software (e.g., Microsoft Word™ or Corel WordPerfect™) and database software (e.g., spreadsheet software such as Microsoft Excel™, Corel Quattro Pro™, or database programs such as Microsoft Access™ or Paradox™) can be adapted to the present invention. Software for performing, e.g., rotatable member rotation, material conveyance to and/or from mixing cartridges, mixing process monitoring, assay detection, and data deconvolution is optionally constructed by one of skill using a standard programming language such as Visual basic, C, C++, Fortran, Basic, Java, or the like.

The mixing stations and related systems of the invention optionally include detection components configured to detect one or more detectable signals or parameters from a given mixing process, e.g., from materials disposed within mixing cartridge cavities. In some embodiments, systems are configured to detect detectable signals or parameters that are upstream and/or downstream of a given mixing process involving the mixing cartridges and mixing stations described herein. Suitable signal detectors that are optionally utilized in these systems detect, e.g., pH, temperature, pressure, density, salinity, conductivity, fluid level, radioactivity, luminescence, fluorescence, phosphorescence, molecular mass, emission, transmission, absorbance, and/or the like. In some embodiments, the detector monitors a plurality of signals, which correspond in position to “real time” results. Example detectors or sensors include PMTs, CCDs, intensified CCDs, photodiodes, avalanche photodiodes, optical sensors, scanning detectors, or the like. Each of these as well as other types of sensors is optionally readily incorporated into the mixing stations and systems described herein. The detector optionally moves relative to mixing cartridges or stations, sample containers or other assay components, or alternatively, mixing cartridges or stations, sample containers or other assay components move relative to the detector. Optionally, the mixing stations and systems of the invention include multiple detectors. In these stations and systems, such detectors are typically placed either in or adjacent to, e.g., a mixing cartridge cavity or other vessel, such that the detector is in sensory communication with the mixing cartridge cavity or other vessel (i.e., the detector is capable of detecting the property of the cavity or vessel or portion thereof, the contents of a portion of the cavity or vessel, or the like, for which that detector is intended).

The detector optionally includes or is operably linked to a computer, e.g., which has system software for converting detector signal information into assay result information or the like. For example, detectors optionally exist as separate units, or are integrated with controllers into a single instrument. Integration of these functions into a single unit facilitates connection of these instruments with the computer, by permitting the use of a few or even a single communication port for transmitting information between system components. Detection components that are optionally included in the systems of the invention are described further in, e.g., Skoog et al., Principles of Instrumental Analysis, 6^(th) Ed., Brooks Cole (2006) and Currell, Analytical Instrumentation: Performance Characteristics and Quality, John Wiley & Sons, Inc. (2000), which are both incorporated by reference.

The stations and systems of the invention optionally also include at least one robotic translocation or gripping component that is structured to grip and translocate mixing cartridges or other containers between components of the stations or systems and/or between the stations or systems and other locations (e.g., other work stations, etc.). In certain embodiments, for example, systems further include gripping components that move mixing cartridges between cartridge receiver/rotation assemblies, incubation or storage components, and the like. A variety of available robotic elements (robotic arms, movable platforms, etc.) can be used or modified for use with these systems, which robotic elements are typically operably connected to controllers that control their movement and other functions.

FIG. 8 is a schematic showing a representative system including an information appliance in which various aspects of the present invention may be embodied. Other exemplary systems are also described herein. As will be understood by practitioners in the art from the teachings provided herein, the invention is optionally implemented in hardware and software. In some embodiments, different aspects of the invention are implemented in either client-side logic or server-side logic. As will also be understood in the art, the invention or components thereof may be embodied in a media program component (e.g., a fixed media component) containing logic instructions and/or data that, when loaded into an appropriately configured computing device, cause that apparatus or system to perform according to the invention. As will additionally be understood in the art, a fixed media containing logic instructions may be delivered to a viewer on a fixed media for physically loading into a viewer's computer or a fixed media containing logic instructions may reside on a remote server that a viewer accesses through a communication medium in order to download a program component.

FIG. 8 shows information appliance or digital device 800 that may be understood as a logical apparatus (e.g., a computer, etc.) that can read instructions from media 817 and/or network port 819, which can optionally be connected to server 820 having fixed media 822. Information appliance 800 can thereafter use those instructions to direct server or client logic, as understood in the art, to embody aspects of the invention. One type of logical apparatus that may embody the invention is a computer system as illustrated in 800, containing CPU 807, optional input devices 809 and 811, disk drives 815 and optional monitor 805. Fixed media 817, or fixed media 822 over port 819, may be used to program such a system and may represent a disk-type optical or magnetic media, magnetic tape, solid state dynamic or static memory, or the like. In specific embodiments, the aspects of the invention may be embodied in whole or in part as software recorded on this fixed media. Communication port 819 may also be used to initially receive instructions that are used to program such a system and may represent any type of communication connection. Optionally, aspects of the invention are embodied in whole or in part within the circuitry of an application specific integrated circuit (ACIS) or a programmable logic device (PLD). In such a case, aspects of the invention may be embodied in a computer understandable descriptor language, which may be used to create an ASIC, or PLID.

In addition, FIG. 8 also shows mixing station 802, which is operably connected to information appliance 800 via server 820. Optionally, mixing station 802 is directly connected to information appliance 800. During operation, mixing station 802 typically mixes materials with mixing cartridge cavities (e.g., to maintain particles in fluidic materials in suspension, etc.), e.g., as part of an assay or other process. FIG. 8 also shows detector 824, which is optionally included in the systems of the invention. As shown, detector 824 is operably connected to information appliance 800 via server 820. In some embodiments, detector 824 is directly connected to information appliance 800. In certain embodiments, detector 824 is configured to detect detectable signals produced in a cavity of a mixing cartridge positioned on a cartridge support structure of mixing station 802.

C. Example System and Related Process Embodiments

To further illustrate exemplary embodiments of the invention, FIGS. 9 A-G schematically depict a portion of a representative system for nucleic acid amplification product desalting and molecular mass measurement that includes a mixing station as a sub-system component. The measured molecular masses of the amplification products are typically used to determine base compositions of the corresponding amplification products, which are then generally correlated with the identities or organismal sources of the initial template nucleic acids, for example, as part of a research or in-vitro diagnostic application, among many others.

As shown in FIGS. 9 A-G, components of representative system 900 include microplate handling component or system 10, material transfer component 902, mixing station 904, wash stations 906 and 908, sample processing component 910, and sample injector 912. During operation, microplates are typically stored or positioned in input non-priority microplate storage unit 12, output non-priority microplate storage unit 14, priority microplate storage unit 16, microplate processing area 18, and non-priority microplate holding area 20 (e.g., on non-priority microplate holding component 22) of microplate handling component 10. As also shown, microplate handling component 10 also includes barcode reader 36. In the exemplary embodiment shown, barcode reader 36 is configured to read barcodes disposed on microplates when the microplates are disposed in or proximal to non-priority microplate holding area 20, e.g., to track the microplates or samples contained in the microplates in microplate handling system 10. In some embodiments, for example, non-priority microplates are stored in input non-priority microplate storage unit 12 and priority microplates are stored in priority microplate storage unit 16 after target regions of template nucleic acids in those plates have been amplified, e.g., at a separate thermocycling station or nucleic acid amplification component. Essentially any thermal cycling station or device is optionally adapted for use with a system of the invention, such as system 900. Examples of suitable thermocycling devices that are optionally utilized are available from many different commercial suppliers, including Mastercycler® devices (Eppendorf North America, Westbury, N.Y., U.S.A.), the COBAS® AMPLICOR Analyzer (Roche Molecular Systems, Inc., Pleasanton, Calif., U.S.A.), MyCycler and iCycler Thermal Cyclers (Bio-Rad Laboratories, Inc., Hercules, Calif., U.S.A.), and the SmartCycler System (Cepheid, Sunnyvale, Calif., U.S.A.), among many others. In other exemplary embodiments, sample preparation components, nucleic acid amplification components, and related fluid handling or material transfer components are integrated with the systems described herein, e.g., to fully automate a given nucleic acid amplification and analysis process. Instruments that can be adapted for this purpose include, for example, the m2000™ automated instrument system (Abbott Laboratories, Abbott Park, Ill., U.S.A.), the GeneXpert System (Cepheid, Sunnyvale, Calif., U.S.A.), and the COBAS® AmpliPrep® System (Roche Molecular Systems, Inc., Pleasanton, Calif., U.S.A.), and the like.

Microplates are transferred from input non-priority microplate storage unit 12 or priority microplate storage unit 16 to microplate processing area 18 using platform 28 of a microplate transport mechanism. As referred to above and as shown in, e.g., FIGS. 9 F and G, platform 28 is operably connected to X-axis linear motion component 38. X-axis linear motion component 38 includes gantry 40. Platform 28 is operably connected to carriage 42, which moves along gantry 40. As further shown in FIGS. 9 F and G, microplate transport mechanism 26 also includes Y-axis linear motion component 44 operably connected to carriage 42 and to platform 28. Y-axis linear motion component 44 is configured to raise and lower platform 28 along the Y-axis. Suitable linear motion components, motors, and motor drives are generally available from many different commercial suppliers including, e.g., Techno-Isel Linear Motion Systems (New Hyde Park, N.Y., U.S.A.), NC Servo Technology Corp. (Westland, Mich., USA), Enprotech Automation Services (Ann Arbor, Mich., U.S.A.), Yaskawa Electric America, Inc. (Waukegan, Ill., U.S.A.), ISL Products International, Ltd. (Syosset, N.Y., U.S.A.), AMK Drives & Controls, Inc. (Richmond, Va., U.S.A.), Aerotech, Inc. (Pittsburgh, Pa., U.S.A.), HD Systems Inc. (Hauppauge, N.Y., U.S.A.), and the like. Additional detail relating to motors and motor drives are described in, e.g., Polka, Motors and Drives, ISA (2002) and Hendershot et al., Design of Brushless Permanent-Magnet Motors, Magna Physics Publishing (1994), which are both incorporated by reference. Microplate handling components are also described in, e.g., U.S. Provisional Patent App. No. 61/097,510, entitled “MICROPLATE HANDLING SYSTEMS AND RELATED COMPUTER PROGRAM PRODUCTS AND METHODS” filed Sep. 16, 2008 by Hofstadler et al., which is incorporated by reference in its entirety.

Material transfer component 902 includes sample input gantry 914 and sample output gantry 916. Input gantry head 918 is configured to move along sample input gantry 914, whereas output gantry head 920 is configured to move along sample output gantry 916. Input gantry head 918 and output gantry head 920 each include needles that are configured to aspirate and dispense fluidic materials. Further, input gantry head 918 and output gantry head 920 are each configured to be raised and lowered along the Y-axis. During operation of exemplary system 900, the needle or pipetting tip of input gantry head 918 is typically used to aspirate an aliquot of magnetically responsive particles (e.g., magnetically responsive beads, such as BioMag®Plus Amine superparamagnetic microparticles available from Bangs Laboratories, Inc., Fishers, Ind., U.S.A.) that bind nucleic acids from a mixing cartridge positioned at mixing station 904. Nucleic acid purification involving magnetically responsive particles is also described in, e.g., U.S. Patent App. Pub. No. US 2005/0164215, entitled “METHOD FOR RAPID PURIFICATION OF NUCLEIC ACIDS FOR SUBSEQUENT ANALYSIS BY MASS SPECTROMETRY BY SOLUTION CAPTURE,” filed May 12, 2004 by Hofstadler et al., and U.S. Patent App. Pub. No. US 2005/0130196, entitled “METHOD FOR RAPID PURIFICATION OF NUCLEIC ACIDS FOR SUBSEQUENT ANALYSIS BY MASS SPECTROMETRY BY SOLUTION CAPTURE,” filed Sep. 17, 2004 by Hofstadler et al., which are both incorporated by reference in their entirety. Optionally before, but typically after aspirating the aliquot of magnetically responsive particles (e.g., to minimize the possibility of cross-contaminating samples), the needle of input gantry head 918 is also generally used to aspirate an aliquot of an amplification product sample from a selected well of a microplate positioned in microplate processing area 18 of microplate handling system 10. The resulting mixture of magnetically responsive particle and amplification product sample aliquots disposed within the needle of input gantry head 918 is then typically transferred to sample processing component 910 along sample input gantry 914. After dispensing the mixture at sample processing component 910, the needle of input gantry head 918 is typically washed at wash station 906, e.g., to minimize the probability of cross-contaminating samples, prior to repeating this transfer cycle for other amplification product samples contained in the wells of a given microplate (e.g., priority or non-priority microplates) positioned in microplate processing area 18 of microplate handling system 10.

In the embodiment shown, sample processing component 910 is a desalting station that is used to desalt or otherwise purify nucleic acid amplification products in the sample mixture prior to mass spectrometric analysis. Sample processing component 910 includes carrier mechanism 922 (shown as a carousel), which includes a plurality of sample processing units 924. In the illustrated embodiment, each sample processing unit 924 includes cuvette 926 and magnet 928. After a mixture of magnetically responsive particle and amplification product sample aliquots is dispensed into a given cuvette 926, that cuvette is typically rotated in a clockwise direction on carrier mechanism 922 to various positions within sample processing component 910 where various reagents are added to and/or removed from that cuvette (e.g., via various fluidic handling components of manifold 930) as part of the process of purifying the amplification products captured or otherwise bound to the magnetically responsive particles in the mixture. When fluidic materials are removed from the cuvette at a given position within sample processing component 910, the cuvette is typically moved proximal to the magnet of the particular sample processing unit (e.g., cuvette 926 is moved proximal to magnet 928 of sample processing unit 924) using a conveyance mechanism to establish sufficient magnetic communication between the magnet and the magnetically responsive particles such that the magnetically responsive particles are moved to and retained on an internal surface of the cuvette while fluidic materials are removed from the cuvette. At the conclusion of a purification process for a given sample, the purified amplification products are then typically aspirated from the particular cuvette using the needle of output gantry head 920. During or prior this step, the nucleic acid amplification products are eluted from the magnetically responsive particles. After purified amplification products have been removed from a given cuvette, that cuvette is then generally rotated on carrier mechanism 922 into communication with cuvette wash station 927, where the cuvette is washed prior to commencing another purification cycle involving the cuvette and another sample. Sample processing components, such as sample processing component 910 and related desalting/purification methods are also described in, e.g., U.S. Provisional Patent App. No. 61/097,525, entitled “SAMPLE PROCESSING UNITS, SYSTEMS, AND RELATED METHODS” filed Sep. 16, 2008 by Hofstadler et al., U.S. Patent App. Pub. No. US 2005/0164215, entitled “METHOD FOR RAPID PURIFICATION OF NUCLEIC ACIDS FOR SUBSEQUENT ANALYSIS BY MASS SPECTROMETRY BY SOLUTION CAPTURE,” filed May 12, 2004 by Hofstadler et al., and U.S. Patent App. Pub. No. US 2005/0130196, entitled “METHOD FOR RAPID PURIFICATION OF NUCLEIC ACIDS FOR SUBSEQUENT ANALYSIS BY MASS SPECTROMETRY BY SOLUTION CAPTURE,” filed Sep. 17, 2004 by Hofstadler et al., and Hofstadler et al. (2003) “A highly efficient and automated method of purifying and desalting PCR products for analysis by electrospray ionization mass spectrometry” Anal Biochem. 316:50-57, which are each incorporated by reference in their entirety.

Purified and eluted amplification products that have been aspirated from a particular cuvette of sample processing component 910 are typically transported along sample output gantry 916 to sample injector 912 (shown as a two channel time-of-flight injector) using output gantry head 920. That is, the amplification products are typically dispensed from the needle or pipetting tip of output gantry head 920 into one of the two channels of sample injector 912, which generally comprise two independent sample injection syringe pumps that are configured to receive the amplification products. After dispensing the amplification products at sample injector 912, the needle of output gantry head 920 is typically washed at wash station 908 prior to aspirating another purified amplification product sample from sample processing component 910, e.g., to reduce the potential for carryover contamination between samples.

Now referring to FIG. 10, which schematically shows additional components of representative system 900 (sample processing component 910 not shown) from a perspective view. As shown, the additional components include dual sprayer module 932, which includes two independent electrospray ionization sprayers, and time-of-flight mass spectrometer 934. Amplification product samples received at sample injector 912 are typically injected into one of the two sprayers of dual sprayer module 932 for electrospray ionization and mass measurement in time-of-flight mass spectrometer 934. As further shown, the additional components of representative system 900 also include input/output device 936 (shown as a touch screen monitor), computer 937, output device 939 (shown as a printer), reagents and waste module 938, and chassis 940. Input/output device 936, computer 937, and output device 939 are components of a controller of system 900. Controllers are described further herein. Reagents and waste module 938 provide reagent sources and waste receptacles for system 900. Chassis 940 provides mechanical support for microplate handling system 10, sample processing component 910, and other components of system 900. To further illustrate, FIGS. 11 A-C schematically show representative system 900 with an external covering from various views.

In some embodiments, the base compositions of amplification products are determined from detected molecular masses. In these embodiments, base compositions are typically correlated with the identity of an organismal source, genotype, or other attribute of the corresponding template nucleic acids in a given sample. Databases with base compositions and other information useful in these processes are also typically included in these systems. Suitable software and related aspects, e.g., for determining base compositions from detected molecular masses and for performing other aspects of base composition analysis are commercially available from Ibis Biosciences, Inc. (Carlsbad, Calif., U.S.A.).

Particular embodiments of molecular mass-based detection methods and other aspects that are optionally adapted for use with the systems described herein are described in various patents and patent applications, including, for example, U.S. Pat. Nos. 7,108,974; 7,217,510; 7,226,739; 7,255,992; 7,312,036; and 7,339,051; and US patent publication numbers 2003/0027135; 2003/0167133; 2003/0167134; 2003/0175695; 2003/0175696; 2003/0175697; 2003/0187588; 2003/0187593; 2003/0190605; 2003/0225529; 2003/0228571; 2004/0110169; 2004/0117129; 2004/0121309; 2004/0121310; 2004/0121311; 2004/0121312; 2004/0121313; 2004/0121314; 2004/0121315; 2004/0121329; 2004/0121335; 2004/0121340; 2004/0122598; 2004/0122857; 2004/0161770; 2004/0185438; 2004/0202997; 2004/0209260; 2004/0219517; 2004/0253583; 2004/0253619; 2005/0027459; 2005/0123952; 2005/0130196 2005/0142581; 2005/0164215; 2005/0266397; 2005/0270191; 2006/0014154; 2006/0121520; 2006/0205040; 2006/0240412; 2006/0259249; 2006/0275749; 2006/0275788; 2007/0087336; 2007/0087337; 2007/0087338 2007/0087339; 2007/0087340; 2007/0087341; 2007/0184434; 2007/0218467; 2007/0218467; 2007/0218489; 2007/0224614; 2007/0238116; 2007/0243544; 2007/0248969; WO2002/070664; WO2003/001976; WO2003/100035; WO2004/009849; WO2004/052175; WO2004/053076; WO2004/053141; WO2004/053164; WO2004/060278; WO2004/093644; WO 2004/101809; WO2004/111187; WO2005/023083; WO2005/023986; WO2005/024046; WO2005/033271; WO2005/036369; WO2005/086634; WO2005/089128; WO2005/091971; WO2005/092059; WO2005/094421; WO2005/098047; WO2005/116263; WO2005/117270; WO2006/019784; WO2006/034294; WO2006/071241; WO2006/094238; WO2006/116127; WO2006/135400; WO2007/014045; WO2007/047778; WO2007/086904; and WO2007/100397; WO2007/118222, which are each incorporated by reference as if fully set forth herein.

Exemplary molecular mass-based analytical methods and other aspects of use in the systems described herein are also described in, e.g., Ecker et al. (2005) “The Microbial Rosetta Stone Database: A compilation of global and emerging infectious microorganisms and bioterrorist threat agents” BMC Microbiology 5(1):19; Ecker et al. (2006) “The Ibis T5000 Universal Biosensor: An Automated Platform for Pathogen Identification and Strain Typing” JALA 6(11):341-351.; Ecker et al. (2006) “Identification of Acinetobacter species and genotyping of Acinetobacter baumannii by multilocus PCR and mass spectrometry” J Clin Microbiol. 44(8):2921-32.; Ecker et al. (2005) “Rapid identification and strain-typing of respiratory pathogens for epidemic surveillance” Proc Natl Acad Sci USA. 102(22):8012-7; Hannis et al. (2008) “High-resolution genotyping of Campylobacter species by use of PCR and high-throughput mass spectrometry” J Clin Microbiol. 46(4):1220-5; Blyn et al. (2008) “Rapid detection and molecular serotyping of adenovirus by use of PCR followed by electrospray ionization mass spectrometry” J Clin Microbiol. 46(2):644-51; Sampath et al. (2007) “Global surveillance of emerging Influenza virus genotypes by mass spectrometry” PLoS ONE 2(5):e489; Sampath et al. (2007) “Rapid identification of emerging infectious agents using PCR and electrospray ionization mass spectrometry” Ann N Y Acad Sci. 1102:109-20; Hall et al. (2005) “Base composition analysis of human mitochondrial DNA using electrospray ionization mass spectrometry: a novel tool for the identification and differentiation of humans” Anal Biochem. 344(1):53-69; Hofstadler et al. (2003) “A highly efficient and automated method of purifying and desalting PCR products for analysis by electrospray ionization mass spectrometry” Anal Biochem. 316:50-57; Hofstadler et al. (2006) “Selective ion filtering by digital thresholding: A method to unwind complex ESI-mass spectra and eliminate signals from low molecular weight chemical noise” Anal Chem. 78(2):372-378.; and Hofstadler et al. (2005) “TIGER: The Universal Biosensor” Int J Mass Spectrom. 242(1):23-41, which are each incorporated by reference.

In addition to the molecular mass and base composition analyses referred to above, essentially any other nucleic acid amplification technological process is also optionally adapted for use in the systems of the invention. Other exemplary uses of the systems and other aspects of the invention include immunoassays, cell culturing, cell-based assays, compound library screening, and chemical synthesis, among many others. Many of these as well as other exemplary applications of use in the systems of the invention are also described in, e.g., Current Protocols in Molecular Biology, Volumes I, II, and III, 1997 (F. M. Ausubel ed.); Perbal, 1984, A Practical Guide to Molecular Cloning; the series, Methods in Enzymology (Academic Press, Inc.); Sambrook et al., 2001, Molecular Cloning: A Laboratory Manual, Third Edition, Cold Spring Harbor Laboratory Press, Cold Spring Harbor, N.Y.; Oligonucleotide Synthesis, 1984 (M. L. Gait ed.); Nucleic Acid Hybridization, 1985, (Hames and Higgins); Transcription and Translation, 1984 (Hames and Higgins eds.); Animal Cell Culture, 1986 (R. I. Freshney ed.); Berger and Kimmel, Guide to Molecular Cloning Techniques, Methods in Enzymology volume 152 Academic Press, Inc., San Diego, Calif. (Berger), DNA Cloning: A Practical Approach, Volumes I and II, 1985 (D. N. Glover ed.); Immobilized Cells and Enzymes, 1986 (IRL Press); Gene Transfer Vectors for Mammalian Cells, 1987 (J. H. Miller and M. P. Calos eds., Cold Spring Harbor Laboratory); and Methods in Enzymology Vol. 154 and Vol. 155 (Wu and Grossman, and Wu, eds., respectively), which are each incorporated by reference.

D. Example Kits and Related Methods

In certain embodiments, the mixing cartridges of the invention are provided in kits. To illustrate, in some embodiments, kits include only empty mixing cartridges, whereas in other exemplary embodiments kits also include material disposed in the cavities of mixing cartridges and/or in separate containers. The material included in a given kit typically depends on the intended purpose of the mixing cartridges (e.g., for use in a nucleic acid or protein purification process, for use in a cell culture process or screening application, for use in a painting or printing application, for use in chemical synthetic processes, etc.). Accordingly, non-limiting examples of materials optionally included in kits are magnetically responsive particles (e.g., magnetically responsive beads, etc.), water, solvents, buffers, reagents, cell culture media, cells, paint, ink, biopolymers (e.g., nucleic acids, polypeptides, etc.), solid supports (e.g., controlled pore glass (CPG), etc.), and the like. Kits typically also include instructions for mixing the fluidic materials in the cartridges and/or loading the materials into the cavity of the cartridge. In addition, kits also generally include packaging for containing the cartridge(s), the separate container(s), and/or the instructions.

Kits are typically provided in response to receiving an order from a customer. Orders are received through a variety of mechanisms including, e.g., via a personal appearance by the customer or an agent thereof, via a postal or other delivery service (e.g., a common carrier), via a telephonic communication, via an email communication or another electronic medium, or any other suitable method. Further, kits are generally supplied or provided to customers (e.g., in exchange for a form of payment) by any suitable method, including via a personal appearance by the customer or an agent thereof, via a postal or other delivery service, such as a common carrier, or the like.

E. Example Fabrication Methods and Materials

Mixing cartridges or components thereof, cartridge receiver/rotation assemblies, and system components (e.g., mixing stations, microplate storage units, microplate transport mechanisms, support bases, sample processing components, etc.) are optionally formed by various fabrication techniques or combinations of such techniques including, e.g., machining, embossing, extrusion, stamping, engraving, injection molding, cast molding, etching (e.g., electrochemical etching, etc.), or other techniques. These and other suitable fabrication techniques are generally known in the art and described in, e.g., Molinari et al. (Eds.), Metal Cutting and High Speed Machining, Kluwer Academic Publishers (2002), Altintas, Manufacturing Automation: Metal Cutting Mechanics, Machine Tool Vibrations, and CNC Design, Cambridge University Press (2000), Stephenson et al., Metal Cutting Theory and Practice, Marcel Dekker (1997), Fundamentals of Injection Molding, W. J. T. Associates (2000), Whelan, Injection Molding of Thermoplastics Materials, Vol. 2, Chapman & Hall (1991), Rosato, Injection Molding Handbook, 3^(rd) Ed., Kluwer Academic Publishers (2000), Fisher, Extrusion of Plastics, Halsted Press (1976), and Chung, Extrusion of Polymers: Theory and Practice, Hanser-Gardner Publications (2000), which are each incorporated by reference. Exemplary materials optionally used to fabricate mixing cartridges, mixing stations, or components thereof include polymethylmethacrylate, polyethylene, polydimethylsiloxane, polyetheretherketone, polytetrafluoroethylene, polystyrene, polyvinylchloride, polypropylene, polysulfone, polymethylpentene, and polycarbonate, among many others. In some embodiments, mixing cartridges or components thereof are fabricated as disposable or consumable components of mixing stations or related systems. In certain embodiments, following fabrication, system components are optionally further processed, e.g., by coating surfaces with a hydrophilic coating, a hydrophobic coating (e.g., a Xylan 1010DF/870 Black coating available from Whitford Corporation (West Chester, Pa.), etc.), or the like, e.g., to prevent interactions between component surfaces and reagents, samples, or the like.

II. Microplate Handling Systems

The invention relates to automated microplate handling and management, and in various embodiments provides systems, computer program products, and related methods that are useful for this purpose. The systems and other aspects of the invention typically process batches of microplates according to a user-selected order or schedule. Unscheduled, high priority or stat samples, however, are also readily introduced into the systems of the invention for processing ahead of lower or non-priority samples that may have been previously scheduled by a user. In certain embodiments, for example, the processing (e.g., addition and/or removal of material to/from the microplate) of a given non-priority microplate can be rapidly halted in deference to the processing of a priority microplate and then be readily resumed once the processing of that priority microplate is completed.

In many pre-existing automated microplate handling systems, samples are processed in batches according to the order in which microplates are initially loaded into microplate storage units (e.g., on a first-in, first-out basis). These systems are generally not configured to readily handle out of sequence samples, such as stat samples that may become prioritized ahead the remaining samples in a pre-loaded batch of microplates. In certain instances, for example, out of sequence priority samples simply cannot be processed until the processing of a given non-priority microplate or batch of non-priority microplates has been completed.

The systems and related aspects of the invention can be used, or adapted for use, in essentially any application that involves microplates. In certain embodiments, for example, microplates comprising nucleic acid amplification reaction mixtures are loaded into microplate storage units of a microplate handling system of the invention. In some of these embodiments, a microplate transport mechanism of the system transports the microplates to a microplate processing area, where material transfer component transfers aliquots of the reaction mixtures from the wells of the microplates to a sample processing system. In these embodiments, the sample processing system is typically used to purify amplification products or amplicons in the reaction mixture aliquots for subsequent detection or other analysis. To further illustrate, in some of these embodiments, the molecular masses of these purified amplicons are measured using a mass spectrometer. The base compositions of the amplicons are typically determined from the measured molecular masses and correlated with an identity or source of target nucleic acids in the amplification reaction mixtures, such as a pathogenic organism.

Particular embodiments of molecular mass-based detection methods and other aspects that are optionally adapted for use with the systems described herein are described in various patents and patent applications, including, for example, U.S. Pat. Nos. 7,108,974; 7,217,510; 7,226,739; 7,255,992; 7,312,036; and 7,339,051; and US patent publication numbers 2003/0027135; 2003/0167133; 2003/0167134; 2003/0175695; 2003/0175696; 2003/0175697; 2003/0187588; 2003/0187593; 2003/0190605; 2003/0225529; 2003/0228571; 2004/0110169; 2004/0117129; 2004/0121309; 2004/0121310; 2004/0121311; 2004/0121312; 2004/0121313; 2004/0121314; 2004/0121315; 2004/0121329; 2004/0121335; 2004/0121340; 2004/0122598; 2004/0122857; 2004/0161770; 2004/0185438; 2004/0202997; 2004/0209260; 2004/0219517; 2004/0253583; 2004/0253619; 2005/0027459; 2005/0123952; 2005/0130196 2005/0142581; 2005/0164215; 2005/0266397; 2005/0270191; 2006/0014154; 2006/0121520; 2006/0205040; 2006/0240412; 2006/0259249; 2006/0275749; 2006/0275788; 2007/0087336; 2007/0087337; 2007/0087338 2007/0087339; 2007/0087340; 2007/0087341; 2007/0184434; 2007/0218467; 2007/0218467; 2007/0218489; 2007/0224614; 2007/0238116; 2007/0243544; 2007/0248969; WO2002/070664; WO2003/001976; WO2003/100035; WO2004/009849; WO2004/052175; WO2004/053076; WO2004/053141; WO2004/053164; WO2004/060278; WO2004/093644; WO 2004/101809; WO2004/111187; WO2005/023083; WO2005/023986; WO2005/024046; WO2005/033271; WO2005/036369; WO2005/086634; WO2005/089128; WO2005/091971; WO2005/092059; WO2005/094421; WO2005/098047; WO2005/116263; WO2005/117270; WO2006/019784; WO2006/034294; WO2006/071241; WO2006/094238; WO2006/116127; WO2006/135400; WO2007/014045; WO2007/047778; WO2007/086904; and WO2007/100397; WO2007/118222, which are each incorporated by reference as if fully set forth herein.

Exemplary molecular mass-based analytical methods and other aspects of use in the systems described herein are also described in, e.g., Ecker et al. (2005) “The Microbial Rosetta Stone Database: A compilation of global and emerging infectious microorganisms and bioterrorist threat agents” BMC Microbiology 5(1):19; Ecker et al. (2006) “The Ibis T5000 Universal Biosensor: An Automated Platform for Pathogen Identification and Strain Typing” JALA 6(11):341-351.; Ecker et al. (2006) “Identification of Acinetobacter species and genotyping of Acinetobacter baumannii by multilocus PCR and mass spectrometry” J Clin Microbiol. 44(8):2921-32.; Ecker et al. (2005) “Rapid identification and strain-typing of respiratory pathogens for epidemic surveillance” Proc Natl Acad Sci USA. 102(22):8012-7; Hannis et al. (2008) “High-resolution genotyping of Campylobacter species by use of PCR and high-throughput mass spectrometry” J Clin Microbiol. 46(4):1220-5; Blyn et al. (2008) “Rapid detection and molecular serotyping of adenovirus by use of PCR followed by electrospray ionization mass spectrometry” J Clin Microbiol. 46(2):644-51; Sampath et al. (2007) “Global surveillance of emerging Influenza virus genotypes by mass spectrometry” PLoS ONE 2(5):e489; Sampath et al. (2007) “Rapid identification of emerging infectious agents using PCR and electrospray ionization mass spectrometry” Ann N Y Acad Sci. 1102:109-20; Hall et al. (2005) “Base composition analysis of human mitochondrial DNA using electrospray ionization mass spectrometry: a novel tool for the identification and differentiation of humans” Anal Biochem. 344(1):53-69; Hofstadler et al. (2003) “A highly efficient and automated method of purifying and desalting PCR products for analysis by electrospray ionization mass spectrometry” Anal Biochem. 316:50-57; Hofstadler et al. (2006) “Selective ion filtering by digital thresholding: A method to unwind complex ESI-mass spectra and eliminate signals from low molecular weight chemical noise” Anal Chem. 78(2):372-378.; and Hofstadler et al. (2005) “TIGER: The Universal Biosensor” Int J Mass Spectrom. 242(1):23-41, which are each incorporated by reference.

In addition to the molecular mass and base composition analyses referred to above, essentially any other nucleic acid amplification technological process that can be performed in a microplate is also optionally adapted for use in the systems of the invention. Other exemplary uses of the systems and other aspects of the invention include immunoassays, cell culturing, cell-based assays, compound library screening, and chemical synthesis, among many others. Many of these as well as other exemplary applications of use in the systems of the invention are also described in, e.g., Current Protocols in Molecular Biology, Volumes I, II, and III, 1997 (F. M. Ausubel ed.); Perbal, 1984, A Practical Guide to Molecular Cloning; the series, Methods in Enzymology (Academic Press, Inc.); Sambrook et al., 2001, Molecular Cloning: A Laboratory Manual, Third Edition, Cold Spring Harbor Laboratory Press, Cold Spring Harbor, N.Y.; Oligonucleotide Synthesis, 1984 (M. L. Gait ed.); Nucleic Acid Hybridization, 1985, (Hames and Higgins); Transcription and Translation, 1984 (Hames and Higgins eds.); Animal Cell Culture, 1986 (R. I. Freshney ed.); Berger and Kimmel, Guide to Molecular Cloning Techniques, Methods in Enzymology volume 152 Academic Press, Inc., San Diego, Calif. (Berger), DNA Cloning: A Practical Approach, Volumes I and II, 1985 (D. N. Glover ed.); Immobilized Cells and Enzymes, 1986 (IRL Press); Gene Transfer Vectors for Mammalian Cells, 1987 (J. H. Miller and M. P. Calos eds., Cold Spring Harbor Laboratory); and Methods in Enzymology Vol. 154 and Vol. 155 (Wu and Grossman, and Wu, eds., respectively), which are each incorporated by reference. These and many other attributes will be apparent upon reviewing the description provided herein.

A. Exemplary Microplate Handling Systems, Microplate Storage Units, and Computer Program Products

As an overview, FIG. 12 schematically illustrates microplate handling system 100 according to one embodiment of the invention. As shown, microplate handling system 100 includes input non-priority microplate storage unit 102 and output non-priority microplate storage unit 104, which are each structured to store multiple stacked microplates. As further shown, microplate handling system 100 also includes priority microplate storage unit 106, which is structured to store a microplate. In some embodiments, priority microplate storage unit 106 includes a cover, e.g., to minimize the possibility contaminating samples disposed the wells of a priority microplate stored in the storage unit. The support structures of input non-priority microplate storage unit 102, output non-priority microplate storage unit 104, and priority microplate storage unit 106 each include retaining mechanisms 107 that are configured to reversibly retain microplates in the cavities of the respective storage units. Non-priority microplates are typically stored in input non-priority microplate storage unit 102 and output non-priority microplate storage unit 104, whereas priority microplates (e.g., microplates having stat samples) needing more urgent or immediate processing are typically stored in priority microplate storage unit 106. Optionally, other numbers of microplate storage units are included in the systems of the invention. In some embodiments, for example, two or more input non-priority microplate storage units, output non-priority microplate storage units, and/or priority microplate storage units (e.g., 3, 4, 5, 6, 7, 8, 9, 10, or more units) are included, e.g., to increase system capacity, to permit longer periods of unattended usage, and the like.

Microplate handling system 100 also includes microplate processing area 108 and non-priority microplate holding area 110. Microplates are typically positioned in microplate processing area 108 for processing, such as the addition and/or removal of materials to/from the wells of the microplates. Although not shown in FIG. 12, a material transfer component (e.g., fluid handling mechanism or the like) is typically disposed proximal to microplate processing area 108 to effect such microplate processing. Non-priority microplate holding area 110 is typically used to store non-priority plates, when the processing of those plates is interrupted by the introduction of a priority microplate into microplate handling system 100 via priority microplate storage unit 106. As shown, non-priority microplate holding area 110 includes non-priority microplate holding components 112, which together form a platform for holding non-priority microplates above support base 114.

To further illustrate, FIGS. 13 A-C schematically depict more detailed perspective views of input non-priority microplate storage unit 102, which is detachable from support base 114 of microplate handling system 100. Detachable microplate storage units typically facilitate microplate loading and transport to and from a given system. In some embodiments, however, microplate storage units are not detachable from microplate handling systems (e.g., are attached to or fabricated integral with other system components). As shown, non-priority microplate storage unit 102 includes support structure 200 that defines cavity 202, which is configured to store multiple vertically stacked microplates. Support structure 200 includes top end 204 and bottom end 206. Non-priority microplate storage unit 102 also includes base structure 208 operably connected to bottom end 206 of support structure 200. An opening (not within view in FIGS. 13 A-C) is disposed through base structure 208 and communicates with cavity 202. The dimensions of the opening are sufficient to accommodate microplates (e.g., microplates having specifications recommended by the Society for Biomolecular Sciences) moving into or out of cavity 202. As also mentioned above, base structure 208 is configured to detachably engage support base 114 of microplate handling system 100.

Although not within view in FIGS. 13 A-C, non-priority microplate storage unit 102 also includes a retaining mechanism (e.g., grippers that are configured to grip the sides of microplates, etc.) operably connected to base structure 208. In some embodiments, retaining mechanisms are operably connected to support structures of microplate storage units, in lieu of or in addition to being connected to base structures. Retaining mechanisms are configured to reversibly retain microplates in the openings and/or in the cavities of microplate storage units. Retaining mechanisms are described further below and in, e.g., U.S. Pat. No. 6,193,102, entitled “Plate Stacker Apparatus,” which issued Feb. 27, 2001 to Bevirt et al., which is incorporated by reference.

Non-priority microplate storage unit 102 also includes alignment members 212 operably connected to surfaces of support structure 200. Alignment members 212 are configured to align microplates when the microplates are disposed in cavity 202. As also shown, non-priority microplate storage unit 102 includes cover member 214 that is configured to cover microplates when the microplates are disposed in cavity 202. In the embodiment shown in FIG. 12, output non-priority microplate storage unit 104 of microplate handling system 100 has same structure as input non-priority microplate storage unit 102. In other embodiments, however, input and output non-priority microplate storage units have structures that differ from one another (e.g., have different structural configurations, have different microplate holding capacities, etc.).

As further shown in FIGS. 13 A-C, non-priority microplate storage unit 102 also includes handle 210 that is pivotally attached to support structure 200 and to base structure 208. Handles are typically included, e.g., to facilitate the transport (manually or robotically) of microplate storage units to and from a given microplate handling system. Optionally, handles are pivotally attached only to support structures or to base structures. In some embodiments, handles are attached other than pivotally to support and/or base structures (e.g., in a fixed position that permits microplates to be loaded or unloaded from the particular microplate storage unit, etc.). Handle 210 pivots between an open position (shown in FIG. 13A) and closed (shown in FIG. 13C) or partially closed (shown in FIG. 13B) positions. Top end 204 of support structure 200 accommodates microplates moving into or out of cavity 202 when handle 210 is in the open position.

Handle 210 is shown as a swing arm having ends 217 that are pivotally attached to the base structure 208. Ends 217 of the swing arm extend through base structure 208 and are configured to align base structure 208 relative to support base 114 of microplate handling system 100, when handle 210 is in a closed position (shown in FIG. 13C) and support structure 208 engages the support base 114 of microplate handling system 100. As also shown in FIGS. 13 A-C, slots 216 are disposed through support structure 208, and handle 210 includes sliding members 218 (one not within view in FIGS. 13 A-C) that slide in slots 216, e.g., as handle 210 is raised, lowered, or pivoted.

Microplate handling system 100 also includes microplate transport mechanism 116, which is configured to selectively transport microplates between input non-priority microplate storage unit 102, output non-priority microplate storage unit 104, priority microplate storage unit 106, microplate processing area 108, and/or non-priority microplate holding area 110. Microplate transport mechanism 116 includes platform 118 (shown as a nest) that is structured to support microplates as they are transported between these areas and components of the system. Platform 118 is operably connected to an X-axis linear motion component (not within view in FIG. 12). The X-axis linear motion component microplate transport mechanism 116 is configured to selectively move platform 118 along guide track 120, which is parallel to the X-axis. As shown, platform 118 is configured to move beneath input non-priority microplate storage unit 102, output non-priority microplate storage unit 104, and priority microplate storage unit 106, which are each positioned above support base 114 along guide track 120. Although not completely within view in FIG. 2, the X-axis linear motion component includes a gantry disposed underneath support base 114 in addition to an encoder and stepper motor 122 that effect movement of platform 118 along guide track 120. Other motors, such as servo motors or the like are also optionally utilized. Microplate transport mechanism 116 also includes a Y-axis linear motion component (not within view in FIG. 12) operably connected to platform 118. The Y-axis linear motion component is configured to selectively raise and lower platform 118 along the Y-axis, for example, to obtain microplates from input non-priority microplate storage unit 102 and priority microplate storage unit 106, and to deliver microplates to output non-priority microplate storage unit 104. The Y-axis linear motion component also typically includes a stepper motor, servo motor, or other mechanism that effects movement of platform 118 along the Y-axis. Microplate transport mechanisms are described further below.

In addition, controller 124 (shown as a computer) is operably connected to microplate transport mechanism 116 of microplate handling system 100. Controller 124 is configured to selectively (e.g., in a pre-programmed or a direct user-selected order or sequence) direct microplate transport mechanism 116 to: (a) transport a non-priority microplate from input non-priority microplate storage unit 102 to microplate processing area 108; (b) position the non-priority microplate while in microplate processing area 108 (e.g., move the wells of the non-priority microplate along the X-axis and/or Y-axis relative to a material transfer component, etc.); and (c) transport the non-priority microplate from microplate processing area 108 to non-priority microplate holding area 110 (and position the non-priority microplate on non-priority microplate holding components 112 above support base 114) when a priority microplate (e.g., comprising stat samples or the like) is stored in priority microplate storage unit 106. Controller 124 is also configured to selectively direct microplate transport mechanism 116 to: (d) transport the priority microplate from priority microplate storage unit 106 to microplate processing area 108; (e) position the priority microplate while in microplate processing area 108 (e.g., move the wells of the priority microplate along the X-axis and/or Y-axis relative to a material transfer component, etc.); and (f) transport the priority microplate from microplate processing area 108 to output non-priority microplate storage unit 104 or to priority microplate storage unit 106 (e.g., once processing of the priority microplate is completed). In addition, controller 124 is also configured to selectively direct microplate transport mechanism 116 to: (g) transport the non-priority microplate from non-priority microplate holding area 110 to microplate processing area 108 (e.g., to resume processing the non-priority microplate); and (h) transport the non-priority microplate from microplate processing area 108 to output non-priority microplate storage unit 104 (e.g., once processing of the non-priority microplate is completed). Controllers and exemplary systems are described further below.

As also shown in FIG. 12, microplate handling system 100 also includes barcode reader 126. In the exemplary embodiment shown, barcode reader 126 is configured to read barcodes disposed on microplates when the microplates are disposed in or proximal to non-priority microplate holding area 110, e.g., to track the microplates or samples contained in the microplates in microplate handling system 100, particularly when microplate handling system 100 is included as a sub-system component of a system. Barcode reader 126 is typically operably connected to controller 124, which generally includes or is connected to a database of microplate/sample tracking information. Optionally, a barcode reader is disposed in or proximal to input non-priority microplate storage unit 102, output non-priority microplate storage unit 104, priority microplate storage unit 106, or microplate processing area 108, in lieu of being disposed in or proximal to non-priority microplate holding area 110 as shown, e.g., in FIG. 12. In some embodiments, the microplate handling systems of the invention includes multiple barcode readers.

The controllers of the systems described herein are generally configured to effect microplate transport and positioning. Controllers are typically operably connected to one or more system components, such as motors (e.g., via motor drives), microplate transport mechanisms (e.g., X-, Y- and/or Z-axis motion components, etc.), cleaning components, detectors, fluid sensors, robotic translocation devices, or the like, to control operation of these components. More specifically, controllers are generally included either as separate or integral system components that are utilized to effect, e.g., the movement of microplate retaining mechanisms of microplate storage units, the transport of microplates between system areas or components, the positioning of microplates relative to material transfer components, the detection and/or analysis of detectable signals received from sample materials by detectors, etc. Controllers and/or other system components is/are generally coupled to an appropriately programmed processor, computer, digital device, or other logic device or information appliance (e.g., including an analog to digital or digital to analog converter as needed), which functions to instruct the operation of these instruments in accordance with preprogrammed or user input instructions (e.g., microplate selection and routing, well selection, fluid volumes to be conveyed, etc.), receive data and information from these instruments, and interpret, manipulate and report this information to the user. In certain embodiments, the controller comprises or is operably connected to a database that includes microplate descriptors, such as the well and plate locations of particular sample materials to facilitate sample tracking.

A controller or computer optionally includes a monitor which is often a cathode ray tube (“CRT”) display, a flat panel display (e.g., active matrix liquid crystal display, liquid crystal display, etc.), or others. Computer circuitry is often placed in a box, which includes numerous integrated circuit chips, such as a microprocessor, memory, interface circuits, and others. The box also optionally includes a hard disk drive, a floppy disk drive, a high capacity removable drive such as a writeable CD-ROM, and other common peripheral elements. Inputting devices such as a keyboard or mouse optionally provide for input from a user. An exemplary system comprising a computer is schematically illustrated in FIG. 14.

The computer typically includes appropriate software for receiving user instructions, either in the form of user input into a set of parameter fields, e.g., in a GUI, or in the form of preprogrammed instructions, e.g., preprogrammed for a variety of different specific operations. The software then converts these instructions to appropriate language for instructing the operation of one or more controllers to carry out the desired operation, e.g., positioning a microplate in a microplate processing area, aspirating fluidic materials from selected wells of a microplate, or the like. The computer then receives the data from, e.g., sensors/detectors included within the system, and interprets the data, either provides it in a user understood format, or uses that data to initiate further controller instructions, in accordance with the programming, e.g., such as in monitoring detectable signal intensity, microplate positioning, or the like.

More specifically, the software utilized to control the operation of the microplate handling systems of the invention typically includes logic instructions that direct, e.g., (a) transport a non-priority microplate from an input non-priority microplate storage unit of the microplate handling system to a microplate processing area of the microplate handling system; (b) position the non-priority microplate while in the microplate processing area; (c) transport the non-priority microplate from the microplate processing area to a non-priority microplate holding area of the microplate handling system when a priority microplate is stored in a priority microplate storage unit of the microplate handling system; (d) transport the priority microplate from the priority microplate storage unit to the microplate processing area; (e) position the priority microplate while in the microplate processing area; (f) transport the priority microplate from the microplate processing area to an output non-priority microplate storage unit of the microplate handling system or to the priority microplate storage unit; (g) transport the non-priority microplate from the non-priority microplate holding area to the microplate processing area of the microplate handling system; and (h) transport the non-priority microplate from the microplate processing area to the output non-priority microplate storage unit. In some embodiments, the software includes logic instructions for directing a material transfer component to transfer material to and/or from selected wells disposed in a microplate when the microplate is positioned in the microplate processing area. Optionally, the software includes logic instructions for directing a barcode reader of the microplate handling system to read barcodes disposed on microplates. The logic instructions of the software are typically embodied on a computer readable medium, such as a CD-ROM, a floppy disk, a tape, a flash memory device or component, a system memory device or component, a hard drive, a data signal embodied in a carrier wave, and/or the like. Other computer readable media are known to persons of skill in the art. In some embodiments, the logic instructions are embodied in read-only memory (ROM) in a computer chip present in one or more system components, without the use of personal computers.

The computer can be, e.g., a PC (Intel x86 or Pentium chip-compatible DOS™ OS2™, WINDOWS™, WINDOWS NT™, WINDOWS98™, WINDOWS2000™, WINDOWS XP™ WINDOWS Vista™, LINUX-based machine, a MACINTOSH™, Power PC, or a UNIX-based (e.g., SUN™ work station) machine) or other common commercially available computer which is known to one of skill. Standard desktop applications such as word processing software (e.g., Microsoft Word™ or Corel WordPerfect™) and database software (e.g., spreadsheet software such as Microsoft Excel™, Corel Quattro Pro™, or database programs such as Microsoft Access™ or Paradox™) can be adapted to the present invention. Software for performing, e.g., microplate transport, material conveyance to and/or from selected wells of a microplate, assay detection, and data deconvolution is optionally constructed by one of skill using a standard programming language such as Visual basic, C, C++, Fortran, Basic, Java, or the like.

The automated systems of the invention are optionally further configured to detect and quantify absorbance, transmission, and/or emission (e.g., luminescence, fluorescence, etc.) of light, and/or changes in those properties in samples that are arrayed in the wells of a multi-well container, on a substrate surface, or at other material sites. Alternatively, or simultaneously, detectors can quantify any of a variety of other signals from microplates or other containers including chemical signals (e.g., pH, ionic conditions, or the like), heat (e.g., for monitoring endothermic or exothermic reactions, e.g., using thermal sensors) or any other suitable physical phenomenon. In addition to other system components described herein, the systems of the invention optionally also include illumination or electromagnetic radiation sources, optical systems, and detectors. Because the systems and methods of the invention are flexible and allow essentially any chemistry to be assayed, they can be used for all phases of assay development, including prototyping and mass screening. A representative system that includes a microplate handling system as a sub-system component as well as a mass spectrometer is described further below.

In some embodiments, the systems of the invention are configured for area imaging, but can also be configured for other formats including as a scanning imager or as a nonimaging counting system. An area imaging system typically places an entire microplate onto the detector plane at one time. Accordingly, there is typically no need to move photomultiplier tubes (PMTs), to scan a laser, or the like, because the detector images the entire container onto many small detector elements (e.g., charge-coupled devices (CCDs), etc.) in parallel. This parallel acquisition phase is typically followed by a serial process of reading out the entire image from the detector. Scanning imagers typically pass a laser or other light beam over the specimen, to excite fluorescence, reflectance, or the like in a point-by-point or line-by-line fashion. In certain cases, confocal-optics are used to minimize out of focus fluorescence. The image is constructed over time by accumulating the points or lines in series. Nonimaging counting systems typically use PMTs or light sensing diodes to detect alterations in the transmission or emission of light, e.g., within wells of a microplate. These systems then typically integrate the light output from each well into a single data point.

A wide variety of illumination or electromagnetic sources and optical systems can be adapted for use in the systems of the present invention. Accordingly, no attempt is made herein to describe all of the possible variations that can be utilized in the systems of the invention and which will be apparent to one skilled in the art. Exemplary electromagnetic radiation sources that are optionally utilized in the systems of the invention include, e.g., lasers, laser diodes, electroluminescence devices, light-emitting diodes, incandescent lamps, arc lamps, flash lamps, fluorescent lamps, and the like. Exemplary optical systems that conduct electromagnetic radiation from electromagnetic radiation sources to sample containers and/or from microplate to detectors typically include one or more lenses and/or mirrors to focus and/or direct the electromagnetic radiation as desired. Many optical systems also include fiber optic bundles, optical couplers, filters (e.g., filter wheels, etc.), and the like.

Suitable signal detectors that are optionally utilized in these systems detect, e.g., molecular mass, emission, luminescence, transmission, fluorescence, phosphorescence, absorbance, or the like. In some embodiments, the detector monitors a plurality of optical signals, which correspond in position to “real time” results. Example detectors or sensors include PMTs, CCDs, intensified CCDs, photodiodes, avalanche photodiodes, optical sensors, scanning detectors, or the like. Each of these as well as other types of sensors is optionally readily incorporated into the systems described herein. The detector optionally moves relative to microplates or other assay components, or alternatively, microplates or other assay components move relative to the detector. In some embodiments, for example, detection components are coupled to translation components that move the detection components relative to microplates positioned in microplate processing areas of the systems described herein. Optionally, the systems of the present invention include multiple detectors. In these systems, such detectors are typically placed either in or adjacent to, e.g., a microplates or other vessel, such that the detector is in sensory communication with the microplates or other vessel (i.e., the detector is capable of detecting the property of the plate or vessel or portion thereof, the contents of a portion of the plate or vessel, or the like, for which that detector is intended). In certain embodiments, detectors are configured to detect electromagnetic radiation originating in the wells of a multi-well container.

The detector optionally includes or is operably linked to a computer, e.g., which has system software for converting detector signal information into assay result information or the like. For example, detectors optionally exist as separate units, or are integrated with controllers into a single instrument. Integration of these functions into a single unit facilitates connection of these instruments with the computer, by permitting the use of a few or even a single communication port for transmitting information between system components. Detection components that are optionally included in the systems of the invention are described further in, e.g., Skoog et al., Principles of Instrumental Analysis, 6^(th) Ed., Brooks Cole (2006) and Currell, Analytical Instrumentation: Performance Characteristics and Quality, John Wiley & Sons, Inc. (2000), which are both incorporated by reference.

The systems of the invention optionally also include at least one robotic translocation or gripping component that is structured to grip and translocate microplates between components of the automated systems and/or between the systems and other locations (e.g., other work stations, etc.). In certain embodiments, for example, systems further include gripping components that move microplates between positioning components, incubation or storage components, etc. A variety of available robotic elements (robotic arms, movable platforms, etc.) can be used or modified for use with these systems, which robotic elements are typically operably connected to controllers that control their movement and other functions.

FIG. 14 is a schematic showing a representative system including an information appliance in which various aspects of the present invention may be embodied. Other exemplary systems are also described herein. As will be understood by practitioners in the art from the teachings provided herein, the invention is optionally implemented in hardware and software. In some embodiments, different aspects of the invention are implemented in either client-side logic or server-side logic. As will also be understood in the art, the invention or components thereof may be embodied in a media program component (e.g., a fixed media component) containing logic instructions and/or data that, when loaded into an appropriately configured computing device, cause that apparatus or system to perform according to the invention. As will additionally be understood in the art, a fixed media containing logic instructions may be delivered to a viewer on a fixed media for physically loading into a viewer's computer or a fixed media containing logic instructions may reside on a remote server that a viewer accesses through a communication medium in order to download a program component.

FIG. 14 shows information appliance or digital device 300 that may be understood as a logical apparatus (e.g., a computer, etc.) that can read instructions from media 317 and/or network port 319, which can optionally be connected to server 320 having fixed media 322. Information appliance 300 can thereafter use those instructions to direct server or client logic, as understood in the art, to embody aspects of the invention. One type of logical apparatus that may embody the invention is a computer system as illustrated in 300, containing CPU 307, optional input devices 309 and 311, disk drives 315 and optional monitor 305. Fixed media 317, or fixed media 322 over port 319, may be used to program such a system and may represent a disk-type optical or magnetic media, magnetic tape, solid state dynamic or static memory, or the like. In specific embodiments, the aspects of the invention may be embodied in whole or in part as software recorded on this fixed media. Exemplary computer program products are described further above. Communication port 319 may also be used to initially receive instructions that are used to program such a system and may represent any type of communication connection. Optionally, aspects of the invention are embodied in whole or in part within the circuitry of an application specific integrated circuit (ACIS) or a programmable logic device (PLD). In such a case, aspects of the invention may be embodied in a computer understandable descriptor language, which may be used to create an ASIC, or PLID.

In addition, FIG. 14 also shows microplate handling system 100, which is operably connected to information appliance 300 via server 320. Optionally, microplate handling system 100 is directly connected to information appliance 300. During operation, microplate handling system 100 typically transports microplates to and/or from selected microplate storage units, e.g., as part of an assay or other process. FIG. 14 also shows detector 324, which is optionally included in the systems of the invention. As shown, detector 324 is operably connected to information appliance 300 via server 320. In some embodiments, detector 324 is directly connected to information appliance 300. In certain embodiments, detector 324 is configured to detect detectable signals produced in the wells of microplates positioned in the microplate processing area of microplate handling system 100. In other embodiments, microplates, or sample materials from those microplates, are transferred (e.g., manually or using a robotic translocation device) to detector 324 to detect detectable signals produced in the wells of microplates or in the sample materials.

B. Exemplary System Embodiment

To further illustrate exemplary embodiments of the invention, FIGS. 15 A-G schematically depict a portion of a representative system for nucleic acid amplification product desalting and molecular mass measurement that includes microplate handling system 100 as a sub-system component. The measured molecular masses of the amplification products are typically used to determine base compositions of the corresponding amplification products, which are then generally correlated with the identities or organismal sources of the initial template nucleic acids, for example, as part of a research or in-vitro diagnostic application, among many others.

As shown in FIGS. 15 A-G, components of representative system 400 include microplate handling system 100, material transfer component 402, mixing station 404, wash stations 406 and 408, sample processing component 410, and sample injector 412. During operation, microplates are typically stored in input non-priority microplate storage unit 102, output non-priority microplate storage unit 104, and priority microplate storage unit 106 of microplate handling system 100. In some embodiments, for example, non-priority microplates are stored in input non-priority microplate storage unit 102 and priority microplates are stored in priority microplate storage unit 106 after target regions of template nucleic acids in those plates have been amplified, e.g., at a separate thermocycling station. Essentially any thermal cycling station or device is optionally adapted for use with a system of the invention, such as system 400. Examples of suitable thermocycling devices that are optionally utilized are available from many different commercial suppliers, including Mastercycler® devices (Eppendorf North America, Westbury, N.Y., U.S.A.), the COBAS® AMPLICOR Analyzer (Roche Molecular Systems, Inc., Pleasanton, Calif., U.S.A.), MyCycler and iCycler Thermal Cyclers (Bio-Rad Laboratories, Inc., Hercules, Calif., U.S.A.), and the SmartCycler System (Cepheid, Sunnyvale, Calif. U.S.A.), among many others. In other exemplary embodiments, sample preparation, thermal cycling, and related fluid handling components are integrated with the systems described herein, e.g., to fully automate a given nucleic acid amplification and analysis process. Instruments that can be adapted for this purpose include, for example, the m2000™ automated instrument system (Abbott Laboratories, Abbott Park, Ill., U.S.A.), the GeneXpert System (Cepheid, Sunnyvale, Calif. U.S.A.), and the COBAS® AmpliPrep® System (Roche Molecular Systems, Inc., Pleasanton, Calif., U.S.A.), and the like.

Microplates are transferred from input non-priority microplate storage unit 102 or priority microplate storage unit 106 to microplate processing area 108 using platform 118 of microplate transport mechanism 116. As referred to above and as shown in, e.g., FIGS. 15 F and G, platform 118 is operably connected to X-axis linear motion component 128. X-axis linear motion component 128 includes gantry 130. Platform 118 is operably connected to carriage 132, which moves along gantry 130. As further shown in FIGS. 15 F and G, microplate transport mechanism 116 also includes Y-axis linear motion component 134 operably connected to carriage 132 and to platform 118. Y-axis linear motion component 134 is configured to raise and lower platform 118 along the Y-axis. Suitable linear motion components, motors, and motor drives are generally available from many different commercial suppliers including, e.g., Techno-Isel Linear Motion Systems (New Hyde Park, N.Y., U.S.A.), NC Servo Technology Corp. (Westland, Mich., USA), Enprotech Automation Services (Ann Arbor, Mich., U.S.A.), Yaskawa Electric America, Inc. (Waukegan, Ill., U.S.A.), ISL Products International, Ltd. (Syosset, N.Y., U.S.A.), AMK Drives & Controls, Inc. (Richmond, Va., U.S.A.), Aerotech, Inc. (Pittsburgh, Pa., U.S.A.), HD Systems Inc. (Hauppauge, N.Y., U.S.A.), and the like. Additional detail relating to motors and motor drives are described in, e.g., Polka, Motors and Drives, ISA (2002) and Hendershot et al., Design of Brushless Permanent-Magnet Motors, Magna Physics Publishing (1994), which are both incorporated by reference.

Material transfer component 402 includes sample input gantry 414 and sample output gantry 416. Input gantry head 418 is configured to move along sample input gantry 414, whereas output gantry head 420 is configured to move along sample output gantry 416. Input gantry head 418 and output gantry head 420 each include needles that are configured to aspirate and dispense fluidic materials. Further, input gantry head 418 and output gantry head 420 are each configured to be raised and lowered along the Y-axis. During operation of exemplary system 900, the needle or pipetting tip of input gantry head 418 is typically used to aspirate an aliquot of magnetically responsive particles (e.g., magnetically responsive beads, such as BioMag®Plus Amine superparamagnetic microparticles available from Bangs Laboratories, Inc., Fishers, Ind., U.S.A.) that bind nucleic acids from magnetically responsive particle source (e.g., a magnetically responsive particle mixing cartridge) positioned at mixing station 404. Magnetically responsive particle sources and mixing stations are also described in, e.g., U.S. Provisional Patent App. No. 61/097,507, entitled “MIXING CARTRIDGES, MIXING STATIONS, AND RELATED KITS, SYSTEMS, AND METHODS” filed Sep. 16, 2008 by Hofstadler et al., which is incorporated by reference in its entirety. Nucleic acid purification involving magnetically responsive particles is also described in, e.g., U.S. Patent App. Pub. No. US 2005/0164215, entitled “METHOD FOR RAPID PURIFICATION OF NUCLEIC ACIDS FOR SUBSEQUENT ANALYSIS BY MASS SPECTROMETRY BY SOLUTION CAPTURE,” filed May 12, 2004 by Hofstadler et al., and U.S. Patent App. Pub. No. US 2005/0130196, entitled “METHOD FOR RAPID PURIFICATION OF NUCLEIC ACIDS FOR SUBSEQUENT ANALYSIS BY MASS SPECTROMETRY BY SOLUTION CAPTURE,” filed Sep. 17, 2004 by Hofstadler et al., which are both incorporated by reference in their entirety. Optionally before, but typically after aspirating the aliquot of magnetically responsive particles (e.g., to minimize the possibility of cross-contaminating samples), the needle of input gantry head 418 is also generally used to aspirate an aliquot of an amplification product sample from a selected well of a microplate positioned in microplate processing area 108 of microplate handling system 100. The resulting mixture of magnetically responsive particle and amplification product sample aliquots disposed within the needle of input gantry head 418 is then typically transferred to sample processing component 410 along sample input gantry 414. After dispensing the mixture at sample processing component 410, the needle of input gantry head 418 is typically washed at wash station 406, e.g., to minimize the probability of cross-contaminating samples, prior to repeating this transfer cycle for other amplification product samples contained in the wells of a given microplate (e.g., priority or non-priority microplates) positioned in microplate processing area 108 of microplate handling system 100.

In the embodiment shown, sample processing component 410 is a desalting station that is used to desalt or otherwise purify nucleic acid amplification products in the sample mixture prior to mass spectrometric analysis. Sample processing component 410 includes carrier mechanism 422 (shown as a carousel), which includes a plurality of sample processing units 424. In the illustrated embodiment, each sample processing unit 424 includes cuvette 426 and magnet 428. After a mixture of magnetically responsive particle and amplification product sample aliquots is dispensed into a given cuvette 426, that cuvette is typically rotated in a counter clockwise direction on carrier mechanism 422 to various positions within sample processing component 410 where various reagents are added to and/or removed from that cuvette (e.g., via various fluidic handling components of manifold 430) as part of the process of purifying the amplification products captured or otherwise bound to the magnetically responsive particles in the mixture. When fluidic materials are removed from the cuvette at a given position within sample processing component 410, the cuvette is typically moved proximal to the magnet of the particular sample processing unit (e.g., cuvette 426 is moved proximal to magnet 428 of sample processing unit 424) using a conveyance mechanism to establish sufficient magnetic communication between the magnet and the magnetically responsive particles such that the magnetically responsive particles are moved to and retained on an internal surface of the cuvette while fluidic materials are removed from the cuvette. At the conclusion of a purification process for a given sample, the purified amplification products are then typically aspirated from the particular cuvette using the needle of output gantry head 420. During or prior this step, the nucleic acid amplification products are eluted from the magnetically responsive particles. After purified amplification products have been removed from a given cuvette, that cuvette is then generally rotated on carrier mechanism 422 into communication with cuvette wash station 427, where the cuvette is washed prior to commencing another purification cycle involving the cuvette and another sample. Sample processing components, such as sample processing component 410 and related desalting/purification methods are also described in, e.g., U.S. Provisional Patent App. No. 61/097,525, entitled “SAMPLE PROCESSING UNITS, SYSTEMS, AND RELATED METHODS” filed Sep. 16, 2008 by Hofstadler et al., U.S. Patent App. Pub. No. US 2005/0164215, entitled “METHOD FOR RAPID PURIFICATION OF NUCLEIC ACIDS FOR SUBSEQUENT ANALYSIS BY MASS SPECTROMETRY BY SOLUTION CAPTURE,” filed May 12, 2004 by Hofstadler et al., and U.S. Patent App. Pub. No. US 2005/0130196, entitled “METHOD FOR RAPID PURIFICATION OF NUCLEIC ACIDS FOR SUBSEQUENT ANALYSIS BY MASS SPECTROMETRY BY SOLUTION CAPTURE,” filed Sep. 17, 2004 by Hofstadler et al., and Hofstadler et al. (2003) “A highly efficient and automated method of purifying and desalting PCR products for analysis by electrospray ionization mass spectrometry” Anal Biochem. 316:50-57, which are each incorporated by reference in their entirety.

Purified and eluted amplification products that have been aspirated from a particular cuvette of sample processing component 410 are typically transported along sample output gantry 416 to sample injector 412 (shown as a two channel time-of-flight injector) using output gantry head 420. That is, the amplification products are typically dispensed from the needle or pipetting tip of output gantry head 420 into one of the two channels of sample injector 412, which generally comprise two independent sample injection syringe pumps that are configured to receive the amplification products. After dispensing the amplification products at sample injector 412, the needle of output gantry head 420 is typically washed at wash station 408 prior to aspirating another purified amplification product sample from sample processing component 410, e.g., to reduce the potential for carryover contamination between samples.

Now referring to FIG. 16, which schematically shows additional components of representative system 400 (sample processing component 410 not shown) from a perspective view. As shown, the additional components include dual sprayer module 432, which includes two independent electrospray ionization sprayers, and time-of-flight mass spectrometer 434. Amplification product samples received at sample injector 412 are typically injected into one of the two sprayers of dual sprayer module 432 for electrospray ionization and mass measurement in time-of-flight mass spectrometer 434. As further shown, the additional components of representative system 400 also include input/output device 436 (shown as a touch screen monitor), computer 437, output device 439 (shown as a printer), reagents and waste module 438, and chassis 440. Input/output device 436, computer 437, and output device 439 are components of a controller of system 400. Controllers are described further herein. Reagents and waste module 438 provide reagent sources and waste receptacles for system 400. Chassis 440 provides mechanical support for microplate handling system 100, sample processing component 410, and other components of system 400. To further illustrate, FIGS. 17 A-C schematically show representative system 400 with an external covering from various views. In addition, other exemplary methods of using the microplate handling systems and other aspects, as well as related computer program products are also described further herein.

In some embodiments, the base compositions of amplification products are determined from detected molecular masses. In these embodiments, base compositions are typically correlated with the identity of an organismal source, genotype, or other attribute of the corresponding template nucleic acids in a given sample. Suitable software and related aspects, e.g., for determining base compositions from detected molecular masses and for performing other aspects of base composition analysis are commercially available from Ibis Biosciences, Inc. (Carlsbad, Calif., U.S.A.). Nucleic acid base composition analysis is also described in many of the publications referred to herein, including, e.g., U.S. Pat. No. 7,255,992, entitled “METHODS FOR RAPID DETECTION AND IDENTIFICATION OF BIOAGENTS FOR ENVIRONMENTAL AND PRODUCT TESTING,” which issued Aug. 14, 2007 to Ecker et al., U.S. Pat. No. 7,226,739, entitled “METHODS FOR RAPID DETECTION AND IDENTIFICATION OF BIOAGENTS IN EPIDEMIOLOGICAL AND FORENSIC INVESTIGATIONS,” which issued Jun. 5, 2007 to Ecker et al., U.S. Pat. No. 7,217,510, entitled “METHODS FOR PROVIDING BACTERIAL BIOAGENT CHARACTERIZING INFORMATION,” which issued May 15, 2007 to Ecker et al., and U.S. Pat. No. 7,108,974, entitled “METHOD FOR RAPID DETECTION AND IDENTIFICATION OF BIOAGENTS,” which issued Sep. 19, 2006 to Ecker et al., which are each incorporated by reference in their entirety.

C. Exemplary Microplate Handling Methods

To further illustrate, FIG. 18 is a flow chart that schematically shows the handling or management of microplates in a microplate handling system according to one embodiment of the invention. Referring now also to FIGS. 19 A-G, which schematically depicts aspects of the process illustrated in FIG. 18 in the context of microplate handling system 100. As shown, the illustrated process commences with query 700, which asks whether a priority microplate (PM) is stored or positioned in a priority microplate storage unit (PMSU) of the microplate handling system. If a priority microplate is stored in the priority microplate storage unit, the priority microplate is transported to the microplate processing area (MPA) from the priority microplate storage unit using the microplate transport mechanism of the microplate handling system (step 702). The priority microplate is processed in the microplate processing area (step 704). Microplate processing generally includes positioning a microplate relative to the material handling component of the system so that materials can be added to and/or removed from selected wells of the microplate. After a processing step is concluded (e.g., fluidic material is added to or removed from a selected well), query 706 asks whether the processing of the priority microplate is completed. If processing is not complete, then processing continues. If the processing of the priority microplate is completed, however, the microplate transport mechanism transports the processed priority microplate to the output non-priority microplate storage unit (ONPMSU) (step 708) and as shown, the process starts over.

As further shown in FIG. 18, if no priority microplate is stored in the priority microplate storage unit (query 700), the process also includes querying whether a non-priority microplate (NPM) is stored in the input non-priority microplate storage unit (INPMSU) (query 710). As shown, if no non-priority microplate is present, then the process ends. If a non-priority microplate is stored in the input non-priority microplate storage unit, then the microplate transport mechanism of the system transports the non-priority microplate to the microplate processing area (step 712) and processing of the non-priority microplate commences (step 714). To illustrate, FIG. 19A schematically shows non-priority microplates stored in input non-priority microplate storage unit 102 of microplate handling system 100, and FIG. 19B schematically shows non-priority microplate 101 positioned in microplate processing area 108 of microplate handling system 100 after being transported from input non-priority microplate storage unit 102. After a given processing step is concluded, query 716 asks whether there is a priority microplate in the priority microplate storage unit. If no priority microplate is stored in the priority microplate storage unit, the process continues with query 718, which asks whether the processing of the non-priority microplate is completed. If the processing of the non-priority microplate is not completed, then processing continues. In contrast, if the processing of the non-priority microplate is completed, then the non-priority microplate is transported to the output non-priority microplate storage unit using the microplate transport mechanism (step 736) and as illustrated, the process starts over.

If the answer to query 716 is that a priority microplate is stored in the priority microplate storage unit, then the non-priority microplate currently positioned in the microplate processing area is transported to the non-priority microplate holding area (NPMHA) using the microplate transport mechanism (step 720). The microplate transport mechanism then transports the priority microplate from the priority microplate storage unit to the microplate processing area (step 722) where processing of the priority microplate begins (step 724). To illustrate, FIG. 19C schematically shows priority microplate 103 stored in priority microplate storage unit 106, while non-priority microplate 101 is positioned in microplate processing area 108 of microplate handling system 100. FIG. 19D schematically depicts priority microplate 103 positioned in microplate processing area 108 of microplate handling system 100 after non-priority microplate 101 has been transported and positioned in non-priority microplate holding area 110. After a processing step is concluded, query 726 asks whether the processing of the priority microplate is completed. As shown, if processing of the priority microplate is not completed, then the processing continues. If processing of the priority microplate is completed, however, the priority microplate is transported to the output non-priority microplate storage unit using the microplate transport mechanism (step 728). The microplate transport mechanism then returns to the non-priority microplate holding area and transports the non-priority microplate, whose processing had been interrupted, to microplate processing area (step 730) to resume processing (step 732). To illustrate, FIG. 19E schematically shows platform 118 in microplate processing area 108 of microplate handling system 100 after the microplate transport mechanism transported priority microplate 103 to output non-priority microplate storage unit 104. To further illustrate, FIG. 19F schematically depicts non-priority microplate 101 positioned in microplate processing area 108 to resume processing after the microplate transport mechanism of microplate handling system 100 transported non-priority microplate 101 from non-priority microplate holding area 110. After a given processing step is concluded, query 734 asks whether the processing of the non-priority microplate is complete. If processing of the non-priority microplate is not completed, then the processing continues. If processing of the non-priority microplate is completed, however, then the microplate transport mechanism transports the non-priority microplate output non-priority microplate storage unit (step 736) and as shown, the process starts over. To further illustrate, FIG. 19G schematically shows microplates in output non-priority microplate storage unit 104 after all of the microplates have been processed using microplate handling system 100.

D. Additional Exemplary Microplate Handling System Embodiments

To illustrate additional representative embodiments, FIGS. 20 A-H schematically depict a portion of the representative system schematically shown in FIGS. 15 A-G in which microplate handling system 900 has been substituted for microplate handling system 100. As shown, microplate handling system 900 includes input non-priority microplate storage unit 902 and output non-priority microplate storage unit 904, which each removably attach to microplate handling system support base 905. As also shown, microplate handling system 900 also includes priority microplate storage unit 906 (shown as a stat tray drawer). Support structure 908 of priority microplate storage unit 906 is operably connected to movement mechanism 910 (shown as guide tracks). Support structure 908 is configured to slide relative to movement mechanism 910 between open and close positions. Priority microplates are typically loaded in priority microplate storage unit 906 when support structure 908 is in an open position. Microplate transport mechanism 116 typically moves priority microplates from priority microplate storage unit 906 when support structure 908 is in a closed position. Additional system features and components are described further herein.

E. Exemplary Fabrication Methods and Materials

System components (e.g., microplate storage units, microplate transport mechanisms, support bases, etc.) are optionally formed by various fabrication techniques or combinations of such techniques including, e.g., machining, embossing, extrusion, stamping, engraving, injection molding, cast molding, etching (e.g., electrochemical etching, etc.), or other techniques. These and other suitable fabrication techniques are generally known in the art and described in, e.g., Molinari et al. (Eds.), Metal Cutting and High Speed Machining, Kluwer Academic Publishers (2002), Altintas, Manufacturing Automation: Metal Cutting Mechanics, Machine Tool Vibrations, and CNC Design, Cambridge University Press (2000), Stephenson et al., Metal Cutting Theory and Practice, Marcel Dekker (1997), Fundamentals of Injection Molding, W. J. T. Associates (2000), Whelan, Injection Molding of Thermoplastics Materials, Vol. 2, Chapman & Hall (1991), Rosato, Injection Molding Handbook, 3.sup.rd Ed., Kluwer Academic Publishers (2000), Fisher, Extrusion of Plastics, Halsted Press (1976), and Chung, Extrusion of Polymers: Theory and Practice, Hanser-Gardner Publications (2000), which are each incorporated by reference. In certain embodiments, following fabrication, system components are optionally further processed, e.g., by coating surfaces with a hydrophilic coating, a hydrophobic coating (e.g., a Xylan 1010DF/870 Black coating available from Whitford Corporation (West Chester, Pa.), etc.), or the like, e.g., to prevent interactions between component surfaces and reagents, samples, or the like.

III. Sample Processing/Spin Mixing Systems

The invention relates to sample purification, and in various embodiments provides sample processing units, carrier mechanisms, sample processing stations, systems, and related methods that are useful for this purpose. The sample processing units and related aspects of the invention can be used, or adapted for use, in a wide variety of sample purification processes. In certain embodiments, for example, microplates comprising nucleic acid amplification reaction mixtures are loaded into microplate storage units of a microplate handling system. In some of these embodiments, a microplate transport mechanism of the system transports the microplates to a microplate processing area, where a material transfer component transfers aliquots of the reaction mixtures from the wells of the microplates to a sample processing system. In these embodiments, the sample processing system is typically used to purify amplification products or amplicons in the reaction mixture aliquots for subsequent detection or other analysis. To further illustrate, in some of these embodiments, the molecular masses of these purified amplicons are measured using a mass spectrometer, e.g., an electrospray ionization time-of-flight mass spectrometer or the like. The base compositions of the amplicons are typically determined from the measured molecular masses and correlated with an identity or source of target nucleic acids in the amplification reaction mixtures, such as a pathogenic organism.

Particular embodiments of molecular mass-based detection methods and other aspects that are optionally adapted for use with the sample processing units and related aspects of the invention are described in various patents and patent applications, including, for example, U.S. Pat. Nos. 7,108,974; 7,217,510; 7,226,739; 7,255,992; 7,312,036; and 7,339,051; and US patent publication numbers 2003/0027135; 2003/0167133; 2003/0167134; 2003/0175695; 2003/0175696; 2003/0175697; 2003/0187588; 2003/0187593; 2003/0190605; 2003/0225529; 2003/0228571; 2004/0110169; 2004/0117129; 2004/0121309; 2004/0121310; 2004/0121311; 2004/0121312; 2004/0121313; 2004/0121314; 2004/0121315; 2004/0121329; 2004/0121335; 2004/0121340; 2004/0122598; 2004/0122857; 2004/0161770; 2004/0185438; 2004/0202997; 2004/0209260; 2004/0219517; 2004/0253583; 2004/0253619; 2005/0027459; 2005/0123952; 2005/0130196 2005/0142581; 2005/0164215; 2005/0266397; 2005/0270191; 2006/0014154; 2006/0121520; 2006/0205040; 2006/0240412; 2006/0259249; 2006/0275749; 2006/0275788; 2007/0087336; 2007/0087337; 2007/0087338 2007/0087339; 2007/0087340; 2007/0087341; 2007/0184434; 2007/0218467; 2007/0218467; 2007/0218489; 2007/0224614; 2007/0238116; 2007/0243544; 2007/0248969; WO2002/070664; WO2003/001976; WO2003/100035; WO2004/009849; WO2004/052175; WO2004/053076; WO2004/053141; WO2004/053164; WO2004/060278; WO2004/093644; WO 2004/101809; WO2004/111187; WO2005/023083; WO2005/023986; WO2005/024046; WO2005/033271; WO2005/036369; WO2005/086634; WO2005/089128; WO2005/091971; WO2005/092059; WO2005/094421; WO2005/098047; WO2005/116263; WO2005/117270; WO2006/019784; WO2006/034294; WO2006/071241; WO2006/094238; WO2006/116127; WO2006/135400; WO2007/014045; WO2007/047778; WO2007/086904; and WO2007/100397; WO2007/118222, which are each incorporated by reference as if fully set forth herein.

Exemplary molecular mass-based analytical methods and other aspects of use in the sample processing units and systems described herein are also described in, e.g., Ecker et al. (2005) “The Microbial Rosetta Stone Database: A compilation of global and emerging infectious microorganisms and bioterrorist threat agents” BMC Microbiology 5(1):19; Ecker et al. (2006) “The Ibis T5000 Universal Biosensor: An Automated Platform for Pathogen Identification and Strain Typing” JALA 6(11):341-351.; Ecker et al. (2006) “Identification of Acinetobacter species and genotyping of Acinetobacter baumannii by multilocus PCR and mass spectrometry” J Clin Microbiol. 44(8):2921-32.; Ecker et al. (2005) “Rapid identification and strain-typing of respiratory pathogens for epidemic surveillance” Proc Natl Acad Sci USA. 102(22):8012-7; Hannis et al. (2008) “High-resolution genotyping of Campylobacter species by use of PCR and high-throughput mass spectrometry” J Clin Microbiol. 46(4):1220-5; Blyn et al. (2008) “Rapid detection and molecular serotyping of adenovirus by use of PCR followed by electrospray ionization mass spectrometry” J Clin Microbiol. 46(2):644-51; Sampath et al. (2007) “Global surveillance of emerging Influenza virus genotypes by mass spectrometry” PLoS ONE 2(5):e489; Sampath et al. (2007) “Rapid identification of emerging infectious agents using PCR and electrospray ionization mass spectrometry” Ann N Y Acad Sci. 1102:109-20; Hall et al. (2005) “Base composition analysis of human mitochondrial DNA using electrospray ionization mass spectrometry: a novel tool for the identification and differentiation of humans” Anal Biochem. 344(1):53-69; Hofstadler et al. (2003) “A highly efficient and automated method of purifying and desalting PCR products for analysis by electrospray ionization mass spectrometry” Anal Biochem. 316:50-57; Hofstadler et al. (2006) “Selective ion filtering by digital thresholding: A method to unwind complex ESI-mass spectra and eliminate signals from low molecular weight chemical noise” Anal Chem. 78(2):372-378.; and Hofstadler et al. (2005) “TIGER: The Universal Biosensor” Int J Mass Spectrom. 242(1):23-41, which are each incorporated by reference.

In addition to the molecular mass and base composition analyses referred to above, essentially any other nucleic acid amplification technological process is also optionally adapted for use in the systems of the invention. Other exemplary uses of the systems and other aspects of the invention include numerous biochemical assays, cell culture purification steps, and chemical synthesis, among many others. Many of these as well as other exemplary applications of use in the systems of the invention are also described in, e.g., Current Protocols in Molecular Biology, Volumes I, II, and III, 1997 (F. M. Ausubel ed.); Perbal, 1984, A Practical Guide to Molecular Cloning; the series, Methods in Enzymology (Academic Press, Inc.); Sambrook et al., 2001, Molecular Cloning: A Laboratory Manual, Third Edition, Cold Spring Harbor Laboratory Press, Cold Spring Harbor, N.Y.; Oligonucleotide Synthesis, 1984 (M. L. Gait ed.); Nucleic Acid Hybridization, 1985, (Hames and Higgins); Transcription and Translation, 1984 (Hames and Higgins eds.); Animal Cell Culture, 1986 (R. I. Freshney ed.); Berger and Kimmel, Guide to Molecular Cloning Techniques, Methods in Enzymology volume 152 Academic Press, Inc., San Diego, Calif. (Berger), DNA Cloning: A Practical Approach, Volumes I and II, 1985 (D. N. Glover ed.); Immobilized Cells and Enzymes, 1986 (IRL Press); Gene Transfer Vectors for Mammalian Cells, 1987 (J. H. Miller and M. P. Calos eds., Cold Spring Harbor Laboratory); and Methods in Enzymology Vol. 154 and Vol. 155 (Wu and Grossman, and Wu, eds., respectively), which are each incorporated by reference.

A. Example Sample Processing Units and Carrier Mechanisms

FIGS. 21 A-D schematically illustrate a sample processing unit or components thereof according to one embodiment of the invention. As shown, sample processing unit 100 includes cuvette 102 operably connected to first motor 104 (shown as a brushless DC motor). First motor 104 (i.e., one embodiment of a rotational mechanism) is configured to rotate cuvette 102 around a central longitudinal axis of cuvette 102. As also shown, first motor 104 is operably connected to support member 106 (shown as a swing arm). First motor 104 is optionally configured (e.g., under the control of an appropriately programmed controller) to rotate cuvette 102 in at least one pulsed mode, during which a substantial portion of the time of rotation, a rate of rotation of cuvette 102 exceeds a rate of rotation of sample material in cuvette 102 such that the sample material is sheared away from a surface of cuvette 102, e.g., to effect mixing of the sample material. To further illustrate, first motor 104 is optionally configured (e.g., again under the control of an appropriately programmed controller) to rotate cuvette 102 in at least one oscillating motion, e.g., also to effect mixing of sample materials. Controllers and rotational modes are described further herein.

Support member 106 is also operably connected to second motor 108 (shown as a brushless direct current motor) via mounting bracket 110. Support member 106 includes first end 112 and second end 114. Cuvette 102 is retained proximal to first end 112 of support member 106 via first motor 104, whereas second motor 108 is operably connected to support member 106 proximal to second end 114 of support member 106. Support member 106 is configured to rotate at least partially around a rotational axis extending through and proximal to second end 114 of support member 106. Pin 116 is fixedly coupled to second end 114 of support member 106 and aligned with the rotational axis. Pin 116 is also operably coupled to second motor 108, which effects rotation of cuvette 102 between second position 118 (e.g., a cuvette rotational or spin position) and first position 120 via pin 116 and support member 106. Collectively, second motor 108, pin 116, and support member 106 are components of one embodiment of an exemplary conveyance mechanism. As additionally shown, sample processing unit 100 includes circuitry 122 that electrically connects to first motor 104, second motor 108, and a controller or power source (not shown) to effect control of first motor 104 and second motor 108.

Sample processing unit 100 also includes magnets 124 (shown as permanent magnets) attached to magnet mounting arm 126, e.g., to facilitate certain processing steps that involve magnetically-based separation of materials. In some embodiments, electromagnets are utilized. Magnet mounting arm 126 is operably connected to mounting bracket 110 and holds magnets 124 in substantially fixed positions relative to cuvette 102 and support member 106. Magnets 124 are disposed proximal to receiving space 126. As illustrated, for example, in FIGS. 21 B and C, when cuvette 102 is in first position 120, cuvette 102 is located at least partially within receiving space 128.

To further illustrate, FIGS. 22 A and B schematically show sample processing unit 200 from perspective views according to another exemplary embodiment of the invention. As shown, sample processing unit 200 includes only single magnet 202 attached to mounting bracket 204 via magnet mounting arm 206 in a substantially fixed positions relative to cuvette 208, support member 210, and first motor 212. In addition to support member 210, the conveyance mechanism of sample processing unit 200 also includes second motor 214, which conveys cuvette 208 between first position 216 (shown in FIG. 22A) and second position 218 (shown in FIG. 22B).

The conveyance mechanisms of the sample processing units of the invention include various embodiments. As mentioned above, in certain embodiments, conveyance mechanisms are configured to rotate cuvettes or other types of containers between selected positions (e.g., between spin mixing, detection, and magnetic particle retention positions). Essentially any other mechanism that can convey containers to and from being within magnetic communication with the magnets of the sample processing units described herein is optionally utilized. As a further illustration, conveyance mechanisms include slidable support members in some embodiments. As shown in FIGS. 23 A and B, for example, the conveyance mechanism of sample processing unit 300 includes support member 302 and gantry or linear slide track 304. Linear drive mechanism 306 is configured to move support member 302 along linear slide track 304. Further, rotational mechanism 308 (e.g., a motor or the like) is operably coupled with container 310 via support member 302. In addition, magnet 312 is operably connected to linear slide track 304 in a substantially fixed position via magnet mounting arm 314. Support member 302 and container 310 are shown in first position 316 in FIG. 23A, whereas they are shown in second position 318 in FIG. 23B.

In certain embodiments, carrier mechanisms are operably connected to sample processing units. Carrier mechanisms are typically configured to move sample processing units to one or more locations, e.g., where various processing steps are performed, such as adding and/or removing fluidic materials from sample processing unit containers. Typically, multiple sample processing units are included on a given carrier mechanism, e.g., to enhance the throughput of sample processing applications performed using the carrier mechanism. In some embodiments, for example, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, or more sample processing units are included on a given carrier mechanism. In addition, essentially any carrier mechanism format that can be used to move sample processing units to selected locations is optionally utilized. In some embodiments, for example, a carrier mechanism includes a carousel that is configured to rotate sample processing units to selected locations. In another representative embodiment, a carrier mechanism includes a conveyor track that is configured to convey sample processing units to one or more locations as desired. Both of these exemplary carrier mechanism embodiments are described further herein. To further illustrate, manifolds for substantially simultaneously distributing fluidic materials to and/or from the containers of multiple sample processing units of a given carrier mechanism are included in certain embodiments, e.g., to enhance process throughput.

One embodiment of a carrier mechanism with a manifold is schematically depicted in FIGS. 24 A-F from various points of view. As shown, carousel 400 includes 22 sample processing units 100 mounted on circular support structure 402, which is operably connected to rotating assembly 404. Rotating assembly 404 includes a slip ring or rotary electrical interface that effects rotation of circular support structure 402 and sample processing units 100 to selected positions around carousel 400. Rotating assembly 404 is mounted on support base 406, which provides structural support to carousel 400. Carousel 400 control includes motor 408 (e.g., a stepper motor, such as a Model No. 5704M-10 or 5709L-06PD available from Lin Engineering, Santa Clara, Calif., U.S.A.) and one or more transmissive photomicrosensors (e.g., a Model No. EE-SX1071 available from Omron Electronics LLC, Schaumburg, Ill., U.S.A.).

As additionally shown, sample cleanup station or manifold 410 is also mounted above carousel 400 on manifold support structure 412, which is connected to rotating assembly 404 and manifold support pillars 414. Manifold 410 is used to aspirate and dispense fluidic materials from/into cuvettes 102 of sample processing units 100 as part of sample purification procedures. More specifically, manifold 410 includes aspirate heads 416 and dispense heads 418. Aspirate heads 416 typically fluidly communicate with fluidic material waste containers (not within view) via flexible tubing, whereas dispense heads 418 generally fluidly communicate with fluidic material sources or reservoirs via flexible tubing. Fluidic material is typically conveyed through the tubing using a fluid conveyance mechanism, such as a pump (e.g., a peristaltic pump, a vacuum pump, or the like). Manifold linear motion component 420, which includes manifold stepper motor 422 (e.g., a Model No. 211-13-02 or 211-20-02 available from Lin Engineering, Santa Clara, Calif., U.S.A.), is configured to raise and lower manifold plate 424. As shown, aspirate heads 416 are mounted on manifold plate 424. When fluidic materials are aspirated from cuvettes 102, rotating assembly 404 typically rotates selected cuvettes 102 into alignment with selected aspirate heads 416. Manifold linear motion component 420 then typically lowers aspirate heads 416 such that needles of aspirate heads 416 contact fluidic materials disposed within the selected cuvettes 102 so that selected volumes of the fluidic materials can be aspirated from the selected cuvettes 102. In some of these embodiments, magnetically responsive particles (with bound or otherwise captured nucleic acids or other analytes) are included in the fluidic materials. In these embodiments, the selected cuvettes 102 are typically moved into magnetic communication with magnets 124 of the corresponding sample processing units 100 so that the magnetically responsive particles are retained within the selected cuvettes 102 as the selected aliquots are removed through the needles of the selected aspirate heads 416. After a given fluidic material aspiration step is performed, manifold linear motion component 420 typically raises manifold plate 424 and aspirate heads 416 a sufficient distance such that rotating assembly 404 can rotate cuvettes 102 to other locations without contacting the needles of aspirate heads 416. As further illustrated, dispense heads 418 are mounted in substantially fix positions on manifold support structure 412 such that they can fluidly communicate with cuvettes 102 when cuvettes 102 are positioned beneath and aligned with the needles of dispense heads 418. During operation, e.g., before or after a given aspiration step is performed, rotating assembly 404 typically rotates selected cuvettes 102 into alignment with selected dispense heads 418 so that selected volumes of fluidic material (e.g., reagent mixtures, elution buffers, etc.) can be dispensed into the selected cuvettes 102. Before or after a given aspiration or dispensing step is performed, selected cuvettes 102 are typically spun using first motors 104 of sample processing units 100 to mix fluidic materials in the selected cuvettes 102. Exemplary systems that include carousels and manifolds are described further herein.

To illustrate another exemplary embodiment, FIGS. 25 A and B schematically depict a carrier mechanism that includes a conveyor track from top and side elevation views, respectively. As shown, carrier mechanism 500 includes conveyor track 502 (e.g., a conveyor belt, etc.), which is configured to rotate counter-clockwise around rotational couplings 504 (e.g., pulleys or the like). Sample processing units 506, which include containers 508, are connected to conveyor track 502. During operation, rotational couplings 504 rotate sample processing units 506 to fluid transfer stations 510, 512, and 516, which include fluid transfer heads 518, 520, and 522, respectively, that each have an aspirate/dispense needle. Fluid transfer heads 518, 520, and 522 are configured to be raised and lowered. As shown, for example, in FIG. 25B, when sample processing units 506 are aligned beneath fluid transfer heads 518, 520, and 522, the heads are typically lowered so that the aspirate/dispense needles can fluidly communicate with containers 508. Note that the container of the sample processing unit depicted on the near side of conveyor track 502 in FIG. 25B partially obscures the needle of fluid transfer head 520, which is lowered into the container of the sample processing unit (not within view in FIG. 25B) on the far side of conveyor track 502. When sample processing units 506 are rotated around rotational couplings 504, transfer heads 518, 520, and 522 are typically raised a sufficient height to permit the unobstructed passage of containers 508 beneath the needles of transfer heads 518, 520, and 522. As also shown, transfer heads 518 and 522 are also configured to move along gantry tracks 524 and 526, respectively.

B. Example Controllers and Related Systems

Controllers are typically operably connected to sample processing units and carrier mechanisms, whether they are used as stand-alone sample processing stations or as system components. The controllers of the sample processing stations and systems described herein are generally configured to effect, e.g. the rotation of sample processing unit containers to mix sample materials in the containers (e.g., in various selectable modes of rotation, etc.), the movement of containers to and from being within magnetic communication with the magnets of sample processing units, the movement of carrier mechanisms to position sample processing units relative to material transfer components, the transfer of materials to and from the containers of sample processing units, the detection of one or more parameters of sample materials disposed in the containers of sample processing units or of aliquots of those materials taken from those containers, and the like. Controllers are typically operably connected to one or more system components, such as motors (e.g., via motor drives), thermal modulating components, detectors, motion sensors, fluidic handling components, robotic translocation devices, or the like, to control operation of these components. More specifically, controllers are generally included either as separate or integral system components that are utilized to effect, e.g., the rotation of the containers of sample processing units according to one or more selectable rotational modes, the transfer of materials to and/or from the containers of sample processing units, the detection and/or analysis of detectable signals received from sample materials by detectors, etc. Controllers and/or other system components is/are generally coupled to an appropriately programmed processor, computer, digital device, or other logic device or information appliance (e.g., including an analog to digital or digital to analog converter as needed), which functions to instruct the operation of these instruments in accordance with preprogrammed or user input instructions (e.g., mixing mode selection, fluid volumes to be conveyed, etc.), receive data and information from these instruments, and interpret, manipulate and report this information to the user.

A controller or computer optionally includes a monitor which is often a cathode ray tube (“CRT”) display, a flat panel display (e.g., active matrix liquid crystal display, liquid crystal display, etc.), or others. Computer circuitry is often placed in a box, which includes numerous integrated circuit chips, such as a microprocessor, memory, interface circuits, and others. The box also optionally includes a hard disk drive, a floppy disk drive, a high capacity removable drive such as a writeable CD-ROM, and other common peripheral elements. Inputting devices such as a keyboard or mouse optionally provide for input from a user. An exemplary system comprising a computer is schematically illustrated in FIG. 26.

The computer typically includes appropriate software for receiving user instructions, either in the form of user input into a set of parameter fields, e.g., in a GUI, or in the form of preprogrammed instructions, e.g., preprogrammed for a variety of different specific operations. The software then converts these instructions to appropriate language for instructing the operation of one or more controllers to carry out the desired operation, e.g., rotating sample processing unit containers to mix sample materials in the containers, aspirating fluidic materials from sample processing unit containers, dispensing materials into sample processing unit containers, or the like. The computer then receives the data from, e.g., sensors/detectors included within the system, and interprets the data, either provides it in a user understood format, or uses that data to initiate further controller instructions, in accordance with the programming, e.g., such as in monitoring detectable signal intensity, rates or modes of sample processing unit container rotation, or the like.

More specifically, the software utilized to control the operation of the sample processing stations and systems of the invention typically includes logic instructions that selectively direct, e.g., motors to rotate cuvettes in pulsed modes, during which a substantial portion of the time of rotation, a rate of rotation of the cuvettes exceeds a rate of rotation of the samples in the cuvettes such that the samples are sheared away from surfaces of the cuvettes to effect sample mixing, motors to rotate the cuvettes in oscillating motions, and the like. The logic instructions of the software are typically embodied on a computer readable medium, such as a CD-ROM, a floppy disk, a tape, a flash memory device or component, a system memory device or component, a hard drive, a data signal embodied in a carrier wave, and/or the like. Other computer readable media are known to persons of skill in the art. In some embodiments, the logic instructions are embodied in read-only memory (ROM) in a computer chip present in one or more system components, without the use of personal computers.

The computer can be, e.g., a PC (Intel x86 or Pentium chip-compatible DOS™ OS2™, WINDOWS™, WINDOWS NT™, WINDOWS98™, WINDOWS2000™, WINDOWS XP™ WINDOWS Vista™, LINUX-based machine, a MACINTOSH™, Power PC, or a UNIX-based (e.g., SUN™ work station) machine) or other common commercially available computer which is known to one of skill. Standard desktop applications such as word processing software (e.g., Microsoft Word™ or Corel WordPerfect™) and database software (e.g., spreadsheet software such as Microsoft Excel™, Corel Quattro Pro™, or database programs such as Microsoft Access™ or Paradox™) can be adapted to the present invention. Software for performing, e.g., sample processing unit container rotation, material conveyance to and/or from sample processing unit containers, mixing process monitoring, assay detection, and data deconvolution is optionally constructed by one of skill using a standard programming language such as Visual basic, C, C++, Fortran, Basic, Java, or the like.

The sample processing stations and related systems of the invention optionally include detectors or detection components configured to detect one or more detectable signals or parameters from a given process, e.g., from materials disposed within sample processing unit container or taken therefrom. In some embodiments, systems are configured to detect detectable signals or parameters that are upstream and/or downstream of a given process involving the sample processing units described herein. Suitable signal detectors that are optionally utilized in these systems detect, e.g., pH, temperature, pressure, density, salinity, conductivity, fluid level, radioactivity, luminescence, fluorescence, phosphorescence, molecular mass, emission, transmission, absorbance, and/or the like. In some embodiments, the detector monitors a plurality of signals, which correspond in position to “real time” results. Example detectors or sensors include PMTs, CCDs, intensified CCDs, photodiodes, avalanche photodiodes, optical sensors, scanning detectors, or the like. Each of these as well as other types of sensors is optionally readily incorporated into the sample processing stations and systems described herein. The detector optionally moves relative to the stations, sample containers or other assay components, or alternatively, the stations, sample containers or other assay components move relative to the detector. Optionally, the stations and systems of the invention include multiple detectors. In these stations and systems, such detectors are typically placed either in or adjacent to, e.g., a sample processing unit cuvette or other vessel, such that the detector is in sensory communication with the sample processing unit cuvette or other vessel (i.e., the detector is capable of detecting the property of the cuvette or vessel or portion thereof, the contents of a portion of the cuvette or vessel, or the like, for which that detector is intended).

The detector optionally includes or is operably linked to a computer, e.g., which has system software for converting detector signal information into assay result information or the like. For example, detectors optionally exist as separate units, or are integrated with controllers into a single instrument. Integration of these functions into a single unit facilitates connection of these instruments with the computer, by permitting the use of a few or even a single communication port for transmitting information between system components. Detection components that are optionally included in the systems of the invention are described further in, e.g., Skoog et al., Principles of Instrumental Analysis, 6^(th) Ed., Brooks Cole (2006) and Currell, Analytical Instrumentation: Performance Characteristics and Quality, John Wiley & Sons, Inc. (2000), which are both incorporated by reference.

The sample processing stations and systems of the invention optionally also include at least one robotic translocation or gripping component that is structured to grip and translocate containers or other processing components between components of the stations or systems and/or between the stations or systems and other locations (e.g., other work stations, etc.). A variety of available robotic elements (robotic arms, movable platforms, etc.) can be used or modified for use with these systems, which robotic elements are typically operably connected to controllers that control their movement and other functions.

FIG. 26 is a schematic showing a representative system including an information appliance in which various aspects of the present invention may be embodied. Other exemplary systems are also described herein. As will be understood by practitioners in the art from the teachings provided herein, the invention is optionally implemented in hardware and software. In some embodiments, different aspects of the invention are implemented in either client-side logic or server-side logic. As will also be understood in the art, the invention or components thereof may be embodied in a media program component (e.g., a fixed media component) containing logic instructions and/or data that, when loaded into an appropriately configured computing device, cause that apparatus or system to perform according to the invention. As will additionally be understood in the art, a fixed media containing logic instructions may be delivered to a viewer on a fixed media for physically loading into a viewer's computer or a fixed media containing logic instructions may reside on a remote server that a viewer accesses through a communication medium in order to download a program component.

FIG. 26 shows information appliance or digital device 600 that may be understood as a logical apparatus (e.g., a computer, etc.) that can read instructions from media 617 and/or network port 619, which can optionally be connected to server 620 having fixed media 622. Information appliance 600 can thereafter use those instructions to direct server or client logic, as understood in the art, to embody aspects of the invention. One type of logical apparatus that may embody the invention is a computer system as illustrated in 600, containing CPU 607, optional input devices 609 and 611, disk drives 615 and optional monitor 605. Fixed media 617, or fixed media 622 over port 619, may be used to program such a system and may represent a disk-type optical or magnetic media, magnetic tape, solid state dynamic or static memory, or the like. In specific embodiments, the aspects of the invention may be embodied in whole or in part as software recorded on this fixed media. Communication port 619 may also be used to initially receive instructions that are used to program such a system and may represent any type of communication connection. Optionally, aspects of the invention are embodied in whole or in part within the circuitry of an application specific integrated circuit (ACIS) or a programmable logic device (PLD). In such a case, aspects of the invention may be embodied in a computer understandable descriptor language, which may be used to create an ASIC, or PLID.

In addition, FIG. 26 also shows sample processing station 602, which is operably connected to information appliance 600 via server 620. Optionally, sample processing station 602 is directly connected to information appliance 600. During operation, sample processing station 602 typically mixes and retains selected materials (e.g., magnetically responsive particles with captured target materials, etc.) in the cuvettes of the sample processing units of sample processing station 602, e.g., as part of an assay or other process. FIG. 26 also shows material transfer component 623 and detector 624, which are optionally included in the systems of the invention. As shown, material transfer component 623 and detector 624 are operably connected to information appliance 600 via server 620. In some embodiments, material transfer component 623 and/or detector 624 is directly connected to information appliance 600. Material transfer component 623 is typically configured to transfer materials to and/or from the cuvettes of the sample processing units of sample processing station 602. In certain embodiments, detector 624 is configured to detect detectable signals produced in the cuvettes of the sample processing units of sample processing station 602 or in aliquots of materials removed from and/or to be added to those cuvettes.

C. Example Sample Processing System and and Related Process Embodiments

To further illustrate exemplary embodiments of the invention, FIGS. 27 A-G schematically depict a portion of a representative system for nucleic acid amplification product desalting and molecular mass measurement that includes a sample processing station as a sub-system component. The measured molecular masses of the amplification products are typically used to determine base compositions of the corresponding amplification products, which are then generally correlated with the identities or organismal sources of the initial template nucleic acids, for example, as part of a research or in-vitro diagnostic application, among many others.

As shown in FIGS. 27 A-G, components of representative system 700 include microplate handling component or system 10, material transfer component 702, mixing station 704, wash stations 706 and 708, sample processing component 710, and sample injector 712. During operation, microplates are typically stored or positioned in input non-priority microplate storage unit 12, output non-priority microplate storage unit 14, priority microplate storage unit 16, microplate processing area 18, and non-priority microplate holding area 20 (e.g., on non-priority microplate holding component 22) of microplate handling component 10. As also shown, microplate handling component 10 also includes barcode reader 36. In the exemplary embodiment shown, barcode reader 36 is configured to read barcodes disposed on microplates when the microplates are disposed in or proximal to non-priority microplate holding area 20, e.g., to track the microplates or samples contained in the microplates in microplate handling system 10. In some embodiments, for example, non-priority microplates are stored in input non-priority microplate storage unit 12 and priority microplates are stored in priority microplate storage unit 16 after target regions of template nucleic acids in those plates have been amplified, e.g., at a separate thermocycling station or nucleic acid amplification component. Essentially any thermal cycling station or device is optionally adapted for use with a system of the invention, such as system 700. Examples of suitable thermocycling devices that are optionally utilized are available from many different commercial suppliers, including Mastercycler® devices (Eppendorf North America, Westbury, N.Y., U.S.A.), the COBAS® AMPLICOR Analyzer (Roche Molecular Systems, Inc., Pleasanton, Calif., U.S.A.), MyCycler and iCycler Thermal Cyclers (Bio-Rad Laboratories, Inc., Hercules, Calif., U.S.A.), and the SmartCycler System (Cepheid, Sunnyvale, Calif., U.S.A.), among many others. In other exemplary embodiments, sample preparation components, nucleic acid amplification components, and related fluid handling or material transfer components are integrated with the systems described herein, e.g., to fully automate a given nucleic acid amplification and analysis process. Instruments that can be adapted for this purpose include, for example, the m2000™ automated instrument system (Abbott Laboratories, Abbott Park, Ill., U.S.A.), the GeneXpert System (Cepheid, Sunnyvale, Calif. U.S.A.), and the COBAS® AmpliPrep® System (Roche Molecular Systems, Inc., Pleasanton, Calif., U.S.A.), and the like.

Microplates are transferred from input non-priority microplate storage unit 12 or priority microplate storage unit 16 to microplate processing area 18 using platform 28 of a microplate transport mechanism. As referred to above and as shown in, e.g., FIGS. 27 F and G, platform 28 is operably connected to X-axis linear motion component 38. X-axis linear motion component 38 includes gantry 40. Platform 28 is operably connected to carriage 42, which moves along gantry 40. As further shown in FIGS. 27 F and G, microplate transport mechanism 26 also includes Y-axis linear motion component 44 operably connected to carriage 42 and to platform 28. Y-axis linear motion component 44 is configured to raise and lower platform 28 along the Y-axis. Suitable linear motion components, motors, and motor drives are generally available from many different commercial suppliers including, e.g., Techno-Isel Linear Motion Systems (New Hyde Park, N.Y., U.S.A.), NC Servo Technology Corp. (Westland, Mich., USA), Enprotech Automation Services (Ann Arbor, Mich., U.S.A.), Yaskawa Electric America, Inc. (Waukegan, Ill., U.S.A.), ISL Products International, Ltd. (Syosset, N.Y., U.S.A.), AMK Drives & Controls, Inc. (Richmond, Va., U.S.A.), Aerotech, Inc. (Pittsburgh, Pa., U.S.A.), HD Systems Inc. (Hauppauge, N.Y., U.S.A.), and the like. Additional detail relating to motors and motor drives are described in, e.g., Polka, Motors and Drives, ISA (2002) and Hendershot et al., Design of Brushless Permanent-Magnet Motors, Magna Physics Publishing (1994), which are both incorporated by reference. Microplate handling components are also described in, e.g., U.S. Provisional Patent App. No. 61/097,510, entitled “MICROPLATE HANDLING SYSTEMS AND RELATED COMPUTER PROGRAM PRODUCTS AND METHODS” filed Sep. 16, 2008 by Hofstadler et al., which is incorporated by reference in its entirety.

Material transfer component 702 includes sample input gantry 714 and sample output gantry 716. Input gantry head 718 is configured to move along sample input gantry 714, whereas output gantry head 720 is configured to move along sample output gantry 716. Input gantry head 718 and output gantry head 720 each include needles that are configured to aspirate and dispense fluidic materials. Further, input gantry head 718 and output gantry head 720 are each configured to be raised and lowered along the Y-axis. During operation of exemplary system 700, the needle or pipetting tip of input gantry head 718 is typically used to aspirate an aliquot of magnetically responsive particles (e.g., magnetically responsive beads, such as BioMag®Plus Amine superparamagnetic microparticles available from Bangs Laboratories, Inc., Fishers, Ind., U.S.A.) that bind nucleic acids from a mixing cartridge positioned at mixing station 704. Magnetically responsive particle sources and mixing stations are also described in, e.g., U.S. Provisional Patent App. No. 61/097,507, entitled “MIXING CARTRIDGES, MIXING STATIONS, AND RELATED KITS, SYSTEMS, AND METHODS” filed Sep. 16, 2008 by Hofstadler et al., which is incorporated by reference in its entirety. Nucleic acid purification involving magnetically responsive particles is also described in, e.g., U.S. Patent App. Pub. No. US 2005/0164215, entitled “METHOD FOR RAPID PURIFICATION OF NUCLEIC ACIDS FOR SUBSEQUENT ANALYSIS BY MASS SPECTROMETRY BY SOLUTION CAPTURE,” filed May 12, 2004 by Hofstadler et al., and U.S. Patent App. Pub. No. US 2005/0130196, entitled “METHOD FOR RAPID PURIFICATION OF NUCLEIC ACIDS FOR SUBSEQUENT ANALYSIS BY MASS SPECTROMETRY BY SOLUTION CAPTURE,” filed Sep. 17, 2004 by Hofstadler et al., which are both incorporated by reference in their entirety. Optionally before, but typically after aspirating the aliquot of magnetically responsive particles (e.g., to minimize the possibility of cross-contaminating samples), the needle of input gantry head 718 is also generally used to aspirate an aliquot of an amplification product sample from a selected well of a microplate positioned in microplate processing area 18 of microplate handling system 10. The resulting mixture of magnetically responsive particle and amplification product sample aliquots disposed within the needle of input gantry head 718 is then typically transferred to sample processing component 710 along sample input gantry 714. After dispensing the mixture at sample processing component 710, the needle of input gantry head 718 is typically washed at wash station 706, e.g., to minimize the probability of cross-contaminating samples, prior to repeating this transfer cycle for other amplification product samples contained in the wells of a given microplate (e.g., priority or non-priority microplates) positioned in microplate processing area 18 of microplate handling system 10.

In the embodiment shown, sample processing station or component 710 is a desalting station that is used to desalt or otherwise purify nucleic acid amplification products in the sample mixture prior to mass spectrometric analysis. Sample processing component 710 includes carrier mechanism 722 (shown as a carousel), which includes a plurality of sample processing units 724. In the illustrated embodiment, each sample processing unit 724 includes cuvette 726 and magnet 728. After a mixture of magnetically responsive particle and amplification product sample aliquots is dispensed into a given cuvette 726, that cuvette is typically rotated in a counter-clockwise direction on carrier mechanism 722 to various positions within sample processing component 710 where various reagents (e.g., washes with ammonium bicarbonate and/or MeOH, etc.) are added to and/or removed from that cuvette (e.g., via various fluidic handling components of manifold 730) as part of the process of purifying the amplification products captured or otherwise bound to the magnetically responsive particles in the mixture. When fluidic materials are removed from the cuvette at a given position within sample processing component 710, the cuvette is typically moved proximal to the magnet of the particular sample processing unit (e.g., cuvette 726 is moved proximal to magnet 728 of sample processing unit 724) using a conveyance mechanism to establish sufficient magnetic communication between the magnet and the magnetically responsive particles such that the magnetically responsive particles are moved to and retained on an internal surface of the cuvette while fluidic materials are removed from the cuvette. At the conclusion of a purification process for a given sample, the purified amplification products are then typically aspirated from the particular cuvette using the needle of output gantry head 720. During or prior this step, the nucleic acid amplification products are eluted (e.g., using a solution that includes piperidine, imidazole, MeOH, and optionally peptide calibration standards (used as part of subsequent mass spectrometric analyses), or the like) from the magnetically responsive particles. After purified amplification products have been removed from a given cuvette, that cuvette is then generally rotated on carrier mechanism 722 into communication with cuvette wash station 727, where the cuvette is washed prior to commencing another purification cycle involving the cuvette and another sample. Sample desalting/purification methods are also described in, e.g., U.S. Patent App. Pub. No. US 2005/0164215, entitled “METHOD FOR RAPID PURIFICATION OF NUCLEIC ACIDS FOR SUBSEQUENT ANALYSIS BY MASS SPECTROMETRY BY SOLUTION CAPTURE,” filed May 12, 2004 by Hofstadler et al., and U.S. Patent App. Pub. No. US 2005/0130196, entitled “METHOD FOR RAPID PURIFICATION OF NUCLEIC ACIDS FOR SUBSEQUENT ANALYSIS BY MASS SPECTROMETRY BY SOLUTION CAPTURE,” filed Sep. 17, 2004 by Hofstadler et al., and Hofstadler et al. (2003) “A highly efficient and automated method of purifying and desalting PCR products for analysis by electrospray ionization mass spectrometry” Anal Biochem. 316:50-57, which are each incorporated by reference in their entirety.

Purified and eluted amplification products that have been aspirated from a particular cuvette of sample processing component 710 are typically transported along sample output gantry 716 to sample injector 712 (shown as a two channel time-of-flight injector) using output gantry head 720. That is, the amplification products are typically dispensed from the needle or pipetting tip of output gantry head 720 into one of the two channels of sample injector 712, which generally comprise two independent sample injection syringe pumps that are configured to receive the amplification products. After dispensing the amplification products at sample injector 712, the needle of output gantry head 720 is typically washed at wash station 708 prior to aspirating another purified amplification product sample from sample processing component 710, e.g., to reduce the potential for carryover contamination between samples.

Now referring to FIG. 28, which schematically shows additional components of representative system 700 (sample processing component 710 is not shown so that other system components are within view) from a perspective view. As shown, the additional components include dual sprayer module 732, which includes two independent electrospray ionization sprayers, and time-of-flight mass spectrometer 734. Amplification product samples received at sample injector 712 are typically injected into one of the two sprayers of dual sprayer module 732 for electrospray ionization and mass measurement in time-of-flight mass spectrometer 734. As further shown, the additional components of representative system 700 also include input/output device 736 (shown as a touch screen monitor), computer 737, output device 739 (shown as a printer), reagents and waste module 738, and chassis 740. Input/output device 736, computer 737, and output device 739 are components of a controller of system 700. Controllers are described further herein. Reagents and waste module 738 provide reagent sources and waste receptacles for system 700. Chassis 740 provides mechanical support for microplate handling system 10, sample processing component 710, and other components of system 700. To further illustrate, FIGS. 29 A-C schematically show representative system 700 with an external covering from various views.

In some embodiments, the base compositions of amplification products are determined from detected molecular masses. In these embodiments, base compositions are typically correlated with the identity of an organismal source, genotype, or other attribute of the corresponding template nucleic acids in a given sample. Suitable software and related aspects, e.g., for determining base compositions from detected molecular masses and for performing other aspects of base composition analysis are commercially available from Ibis Biosciences, Inc. (Carlsbad, Calif., U.S.A.). Nucleic acid base composition analysis is also described in many of the publications referred to herein, including, e.g., U.S. Pat. No. 7,255,992, entitled “METHODS FOR RAPID DETECTION AND IDENTIFICATION OF BIOAGENTS FOR ENVIRONMENTAL AND PRODUCT TESTING,” which issued Aug. 14, 2007 to Ecker et al., U.S. Pat. No. 7,226,739, entitled “METHODS FOR RAPID DETECTION AND IDENTIFICATION OF BIOAGENTS IN EPIDEMIOLOGICAL AND FORENSIC INVESTIGATIONS,” which issued Jun. 5, 2007 to Ecker et al., U.S. Pat. No. 7,217,510, entitled “METHODS FOR PROVIDING BACTERIAL BIOAGENT CHARACTERIZING INFORMATION,” which issued May 15, 2007 to Ecker et al., and U.S. Pat. No. 7,108,974, entitled “METHOD FOR RAPID DETECTION AND IDENTIFICATION OF BIOAGENTS,” which issued Sep. 19, 2006 to Ecker et al., which are each incorporated by reference in their entirety.

D. Fabrication Methods and Materials

Sample processing units or components thereof, carrier mechanisms or components thereof, and station or system components (e.g., mixing stations, microplate storage units, microplate transport mechanisms, support bases, etc.) are optionally formed by various fabrication techniques or combinations of such techniques including, e.g., machining, embossing, extrusion, stamping, engraving, injection molding, cast molding, etching (e.g., electrochemical etching, etc.), or other techniques. These and other suitable fabrication techniques are generally known in the art and described in, e.g., Molinari et al. (Eds.), Metal Cutting and High Speed Machining, Kluwer Academic Publishers (2002), Altintas, Manufacturing Automation: Metal Cutting Mechanics, Machine Tool Vibrations, and CNC Design, Cambridge University Press (2000), Stephenson et al., Metal Cutting Theory and Practice, Marcel Dekker (1997), Fundamentals of Injection Molding, W. J. T. Associates (2000), Whelan, Injection Molding of Thermoplastics Materials, Vol. 2, Chapman & Hall (1991), Rosato, Injection Molding Handbook, 3^(rd) Ed., Kluwer Academic Publishers (2000), Fisher, Extrusion of Plastics, Halsted Press (1976), and Chung, Extrusion of Polymers: Theory and Practice, Hanser-Gardner Publications (2000), which are each incorporated by reference. Exemplary materials optionally used to fabricate sample processing units, carrier mechanisms, manifolds, or components thereof include metal (e.g., steel, aluminum, etc.), glass, polymethylmethacrylate, polyethylene, polydimethylsiloxane, polyetheretherketone, polytetrafluoroethylene, polystyrene, polyvinylchloride, polypropylene, polysulfone, polymethylpentene, and polycarbonate, among many others. In certain embodiments, following fabrication, system components are optionally further processed, e.g., by coating surfaces with a hydrophilic coating, a hydrophobic coating (e.g., a Xylan 1010DF/870 Black coating available from Whitford Corporation (West Chester, Pa.), etc.), or the like, e.g., to prevent interactions between component surfaces and reagents, samples, or the like.

E. Examples

It is understood that the examples and embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the claimed invention. It is also understood that various modifications or changes in light the examples and embodiments described herein will be suggested to persons skilled in the art and are to be included within the spirit and purview of this application and scope of the appended claims.

A. PCR Product Purification and Desalting Example

1. PCR Product Purification

PCR products were thoroughly purified and desalted before ESI MS. This step typically precedes ESI-MS analysis, because PCR salts and buffer components generally have a deleterious effect on the ESI process. Even small amounts of salts (<1 μmol/L) will typically significantly reduce ESI sensitivity, owing to the appearance of multiple cation adducts in the mass spectra. The protocol used in this example is based on a weak anion-exchange method, in which amplified DNA was bound to a weak anion-exchange resin coated on the outside of magnetic bead particles. Unconsumed deoxynucleoside triphosphates, salts, and other low-molecular-weight species that could interfere with subsequent ESI-MS analysis were removed using a sample processing station system described herein and the PCR cleanup process outlined as follows:

1. Loaded 40 μL PCR Product and 50 μL magnetic bead solution into a clean cuvette;

2. Mixed the beads for 4.5 minutes to allow the DNA to bind the magnetic beads;

3. Positioned the cuvette at the magnet for 30 seconds to separate the beads from the solution;

4. Aspirated the liquid from the cuvette and dispensed 80 μL of 100 mM ammonium bicarbonate in a 50:50 methanol:water solution;

5. Resuspended and washed the beads by mixing for 35 seconds;

6. Positioned the cuvette at the magnet for 15 seconds to separate the beads from the solution;

7. Aspirated the liquid from the cuvette and dispensed 80 μL of 100 mM ammonium bicarbonate in a 50:50 methanol:water solution;

8. Resuspended and washed the beads by mixing for 35 seconds;

9. Positioned the cuvette at the magnet for 15 seconds to separate the beads from the solution;

10. Aspirated the liquid from the cuvette and dispensed 80 μL of 50:50 methanol:water solution;

11. Resuspended and washed the beads by mixing for 35 seconds;

12. Positioned the cuvette at the magnet for 15 seconds to separate the beads from the solution;

13. Aspirated the liquid from the cuvette and dispensed 40 μL of 25 mM piperidine and 25 mM imidazole in 35:65 methanol:water solution;

14. Resuspended the magnetic beads and allowed time for the DNA to elute from the beads for 2 minutes;

15. Positioned the cuvette at the magnet for 30 seconds to separate the beads from the solution; and

16. Aspirated the solution and injected into the ESI-MS for analysis.

TOTAL PCR PRODUCT CLEANUP TIME=10 minutes

2. Cuvette Cleaning Protocol

The cuvette cleaning protocol utilized to clean the cuvette after PCR products were purified and desalted was as follows:

1. Dispensed 160 μL of 25 mM piperidine and 25 mM imidazole in 35:65 methanol:water solution and mixed for 15 seconds;

2. Aspirated solution and dispensed 160 μL of clean (Type I) water into the cuvette;

3. Mixed for 15 seconds; and

4. Aspirated liquid from cuvette.

TOTAL CUVETTE CLEANUP TIME=2 minutes

3. ESI-TOF Mass Spectrometry

A Bruker Daltonics (Billerica, Mass., U.S.A.) MicroTOF-ESI time-of-flight (TOF) mass spectrometer was used to analyze purified and desalted PCR products in this example. Ions from the ESI source underwent orthogonal ion extraction and were focused in a reflectron prior to detection. Ions were formed in the standard MicroTOF-ESI source, which was equipped with an off-axis sprayer and glass capillary. For operation in the negative ion mode, the atmospheric pressure end of the glass capillary was biased at 3500 V relative to the ESI needle during data acquisition. A countercurrent flow of dry N₂ gas was employed to assist in the desolvation process. External ion accumulation was employed to improve ionization duty cycle during data acquisition and to enhance sensitivity in the m/z range of interest. In this example, each 75 μs scan was comprised of 75,000 data points (a 37.5 μs delay followed by a 37.5 μs digitization event at 2 GHz). For each spectrum, 660 000 scans were co-added. Example data obtained from this analysis is shown in FIG. 30.

IV. Ionization Probe Assemblies

The invention relates to ionization probe assemblies that are useful in spraying and ionizing sample materials, and in various embodiments provides individual sub-components, software, control components, and related methods employing the assemblies. In some embodiments, the ionization probe assemblies are configured to substantially continuously introduce sample materials into ion source housings of molecular mass measurement systems via multiple probes that are individually configured to discontinuously spray or otherwise introduce sample materials into the ion source housings. In some embodiments, for example, probes of the ionization probe assemblies are configured to duty cycle between spray and rinse positions that are substantially electrically isolated from one another.

A. Example Systems

FIG. 31 shows a representative time of flight spectrometer (TOF) 100 having an exemplary dual sprayer 110 mounted thereon. FIG. 32 shows the dual sprayer 110 mounted on a TOF chamber 101, showing the chamber detached from the TOF. FIG. 33 shows the dual sprayer 110 separate from the TOF or the TOF chamber. The dual sprayer 110 comprises an ionization probe assembly that includes at least one probe mounting structure 120 and two probes 130 that are movably coupled to the probe mounting structure 120. Any number of configurations may be used to movably couple the probes 130 to the probe mounting structure 120, so long as the desired position and movement of the probes 130 is provided. The probes 130 are configured to discontinuously introduce sample aliquots into the TOF chamber 101 (not shown in FIG. 33). Samples are introduced into a probe via a probe opening 140. The probe 130 may be mounted on a probe conveyance mechanism 150, operably connected to the probe. The probe conveyance mechanism 150 is configured to convey the probe between at least a first position and at least a second position. As shown in FIG. 33, the two probes 130 are configured to pivot around an axis 160 permitting movement from the first position to the second position. The first position is substantially electrically isolated from the second position. The dual sprayer 110 may comprise least two independent probes 130 that are movably coupled to the probe mounting structure 120. Each probe is movably coupled to the probe mounting structure 120 via a pivot mechanism 125. The probe conveyance mechanism 150 comprises a motor 151 operably connected to a pivot mechanisms 125 via belt drive 152.

FIGS. 34a and 34b show a side view of the dual sprayer 110. In FIG. 34a , the front-most probe 130 is shown in the second position, or “spray” position. In FIG. 34b the front-most probe 130 is shown in the first position, or “rinse” position. A cavity is disposed in or proximal to the probe mounting structure 120 to permit movement of the probe 130 into the second position. The cavity typically comprises the second position. In some of these embodiments, the cavity fluidly communicates with at least one outlet. The probes 130 are generally independently movably coupled to the probe mounting structure 120. In certain embodiments, the probe mounting structure 120 includes at least one view port 123 (FIG. 38) to permit viewing of the probes. The one or more view ports 123 (FIG. 38) may comprise a glass, plastic, ceramic or other transparent material to provide a window located on any desired region of the mounting structure 120.

FIG. 35 shows a dual sprayer 110 comprising a cover 200 affixed to and covering the mounting structure 120. The cover 200 may be made of any desired material and can substantially or partially cover the mounting structure 120. The cover 200 may be affixed to the mounting structures by screws, bolts, clamps, pins, or via any other connection means. The cover may comprise one or more slots or openings 210 to allow the probe(s) 130 to stick through the cover 200 and permit the probe(s) 130 to move uninhibited by the cover 200. The cover 200 may further comprise one or more slots or openings that serve as vents 220 to permit air to circulate in and out of the cover 200. One or more fans or pumps (not shown) may also be employed to assist in circulation of air or other gasses throughout the system.

As shown in FIGS. 36a and 36b , the probe mounting structure 120 may comprise an ion source housing back plate 230 that is configured to operably connect to an ion source housing 300. FIGS. 36a and 36b show alternative ion source housing back plates 230 configured for attachment to two different ion source housing 300 configurations. The ion source housing back plate 230 typically comprises at least one alignment feature (not shown) that is structured to align the ion source housing back plate 230 relative to the ion source housing 300 when the ion source housing back plate 230 operably connects to the ion source housing 300. Examples of alignment features include, but are not limited to, markings, grooves, alignment holes, alignment pegs, and the like.

As shown in FIG. 37, the probe 130 comprises at least one channel 131 disposed through a length of the probe 130. The probe 130 may comprise at least one sprayer needle 132 that fluidly communicates with the channel 131. A nebulizer gas source and/or nebulizer gas sheath 133 fluidly communicates with the channel. The probe 130 may also comprise a thermal modulator, configured to modulate a temperature of the probe 130, comprising a nebulizer gas heater 134 and a controller circuit board 135.

As shown in FIG. 38, a first mounting 121 component is operably connected to the probe mounting structure 120. The first mounting component is configured to engage at least a second mounting component (not shown) that is operably connected to an ion source housing 300 (not shown in FIG. 38) when the probe mounting structure 120 is mounted on the ion source housing 300 (not shown in FIG. 38). The first 121 and second (not shown) mounting components may comprise hinge and/or latch components or any other means to moveably attached the mounting structure 120 to the ion source housing 300.

The probe may be movably coupled to the probe mounting structure 120 via a slide mechanism 400. The slide mechanism 400 comprises at least two probes 130, substantially fixedly coupled to the slide mechanism 400, and capable of sliding between a first position and a second position. The first position 130 a comprises a spray position and the second position comprises at least first 130 b and second 130 c rinse positions that are each substantially electrically isolated from the spray position. When a first probe 130 is in the spray position 130 a, a second probe 130 is in the second rinse position 130 b, and when the second probe 130 is in the spray position 130 a, the first probe is in the first rinse position 130 c. The slide mechanism 400 comprises a probe support plate 420 coupled to the probe mounting structure 120 via a linear slide 410, and the probe is mounted on the probe support plate 420. The probe slide mechanism comprises a dual acting pneumatic cylinder 430 operably connected to the probe mounting structure 120 and to the probe support plate 420.

As shown in FIG. 38, an ion source housing back plate 230 comprises one or more surfaces that define at least one spray orifice 139. The dual sprayer assembly 110 also includes at least one rinse cavity 136 that is at least partially disposed within the ion source housing back plate 230 in which the rinse cavity 136 fluidly communicates with at least one outlet 138. The dual sprayer assembly 110 also includes at least one probe support structure 120 coupled to the ion source housing back plate 230 via at least one linear slide 410, and at least one probe 130 substantially fixedly mounted on the probe support structure 120. The probe conveyance mechanism 150 is operably connected to the probe support structure 120. The probe conveyance mechanism 150 is configured to selectively convey the probe support structure 120, such that the probe 130 slides between the spray orifice 139 and the rinse cavity 136 through the opening.

In some embodiments, the invention provides a molecular mass measurement system. The system includes time of flight spectrometer (TOF) 100 that comprises at least one ion source housing 300, and at least one dual sprayer assembly 110 operably connected to the ion source housing 300. The dual sprayer assembly 110 comprises: at least one probe mounting structure 120; at least one probe 130 that comprises a probe opening 140 that can serve as a fluid inlet and a sprayer needle 132 that can serve as a fluid outlet in which the probe opening 140 communicates with the sprayer needle 132 via a channel 131. The probe 130 is movably coupled to the probe mounting structure 120, which probe is configured to discontinuously introduce sample aliquots into the ion source housing 300; and at least one probe conveyance mechanism 150 operably connected to the probe 130, which probe conveyance mechanism 150 is configured to convey the probe 130 between a spray position 130 a and a rinse position 130 b in which the spray position 130 a is substantially electrically isolated from the rinse position 130 b.

In some embodiments, the present invention provides a controller configured to selectively direct the ionization probe assembly 110 to: (a) convey the probe from the rinse position 130 b to the spray position 130 a; (b) spray at least one sample aliquot into the ion source housing 300 from the sample source when the probe is in the spray position 130 a; (c) convey the probe from the spray position 130 a to the rinse position 130 b; and (d) rinse the probe with rinse fluid from a rinse fluid source when the probe is in the rinse position 130 b. In some embodiments, a rinse fluid source is contained on or within the TOF spectrometer 100, TOF chamber 101, or the dual sprayer assembly 110 or is located externally to the sprayer and spectrometer devices.

In some embodiments, the system includes at least one additional system component selected from, e.g., at least one nucleic acid amplification component; at least one sample preparation component; at least one microplate handling component; at least one mixing station; at least one material transfer component; at least one sample processing component; at least one database; and the like.

In some embodiments, the invention provides a computer program product that includes a computer readable medium having one or more logic instructions for directing an ionization probe assembly of a molecular mass measurement system as shown in FIGS. 39a and b : (a) convey a first probe 130 from a first rinse position 130 b to a first spray position 130 a of the molecular mass measurement system, wherein the first rinse position 130 b and the first spray position 130 a are substantially electrically isolated from one another; (b) convey a second probe from a second spray position 130 c to a second rinse position 130 d of the molecular mass measurement system, wherein the second spray position 130 c and the second rinse position 130 d are substantially electrically isolated from one another; (c) spray at least a first sample aliquot into an ion source housing 300 of the molecular mass measurement system via the first probe 130 when the first probe is in the first spray position 130 a; (d) rinse the second probe 130 when the second probe is in the second rinse position 130 d; (e) convey the first probe from the first spray position 130 a to the first rinse position 130 b; (f) convey the second probe from the second rinse position 130 d to the second spray position 130 c; (g) spray at least a second sample aliquot into the ion source housing of the molecular mass measurement system via the second probe 130 when the second probe is in the second spray position 130 c; and, (h) rinse the first probe 130 when the first probe 130 is in the first rinse position 130 b. In some embodiments, the computer program product includes at least one logic instruction for directing the dual spray assembly 110 of the molecular mass measurement system to modulate a temperature of the first probe and/or second probe 130 using at least one thermal modulator operably connected to the first probe and/or second probe. In certain embodiments, the logic instructions are configured to direct the dual spray assembly 110 to execute (a) substantially simultaneously with (b), (c) substantially simultaneously with (d), (e) substantially simultaneously with (f), and/or (g) substantially simultaneously with (h). Typically, a controller of the molecular mass measurement system comprises the logic instructions.

In another aspect, the invention provides a method of spraying sample aliquots into an ion source housing of a molecular mass measurement system. The method includes (a) conveying a first probe 130 from a first rinse position 130 b to a first spray position 130 a of the molecular mass measurement system in which the first rinse position 130 b and the first spray position 130 a are substantially electrically isolated from one another and wherein the first spray position 130 a is in fluid communication with the ion source housing 300; and (b) conveying a second probe 130 from a second spray position 130 c to a second rinse position 130 d of the molecular mass measurement system, wherein the second spray position 130 c and the second rinse position 130 d are substantially electrically isolated from one another. The method also includes (c) spraying at least a first sample aliquot into the ion source housing 300 via the first probe 130 when the first probe 130 is in the first spray position 130 a; (d) rinsing the second probe 130 when the second probe 130 is in the second rinse position 130 d; and (e) conveying the first probe 130 from the first spray position 130 a to the first rinse position 130 b. In addition, the method also includes (f) conveying the second probe 130 from the second rinse position 130 d to the second spray position 130 c in which the second spray position 130 c is in fluid communication with the ion source housing 300; (g) spraying at least a second sample aliquot into the ion source housing 300 of the molecular mass measurement system via the second probe 130 when the second probe 130 is in the second spray position 130 c; and (h) rinsing the first probe 130 when the first probe is in the first rinse position 130 b, thereby spraying the sample aliquots into the ion source housing 300 of the molecular mass measurement system. In certain embodiments, the method includes performing (a) substantially simultaneously with (b), (c) substantially simultaneously with (d), (e) substantially simultaneously with (f), and/or (g) substantially simultaneously with (h).

In some embodiments, the method includes modulating a temperature of the first probe and/or second probe using at least one thermal modulator operably connected to the first probe 130 and/or second probe 130. Typically, the method includes ionizing the first sample aliquot and the second sample aliquot when the first sample aliquot and the second sample aliquot are sprayed into the ion source housing 300. The method also generally includes measuring a molecular mass of at least one component of the first sample aliquot and/or the second sample aliquot using the molecular mass measurement system.

In some embodiments, the component of the first sample aliquot and/or the second sample aliquot comprises at least one nucleic acid molecule. In these embodiments, the method generally comprises determining a base composition of the nucleic acid molecule from the molecular mass of the nucleic acid molecule. In certain of these embodiments, the method includes correlating the base composition of the nucleic acid molecule with an identity or property of the nucleic acid molecule.

In some embodiments, the present invention provides determination of base compositions of the amplicons are typically determined from the measured molecular masses and correlated with an identity or source of target nucleic acids in the amplification reaction mixtures, such as a pathogenic organism. Particular embodiments of molecular mass-based detection methods and other aspects that are optionally adapted for use with the sample processing units and related aspects of the invention are described in various patents and patent applications, including, for example, U.S. Pat. Nos. 7,108,974; 7,217,510; 7,226,739; 7,255,992; 7,312,036; and 7,339,051; and US patent publication numbers 2003/0027135; 2003/0167133; 2003/0167134; 2003/0175695; 2003/0175696; 2003/0175697; 2003/0187588; 2003/0187593; 2003/0190605; 2003/0225529; 2003/0228571; 2004/0110169; 2004/0117129; 2004/0121309; 2004/0121310; 2004/0121311; 2004/0121312; 2004/0121313; 2004/0121314; 2004/0121315; 2004/0121329; 2004/0121335; 2004/0121340; 2004/0122598; 2004/0122857; 2004/0161770; 2004/0185438; 2004/0202997; 2004/0209260; 2004/0219517; 2004/0253583; 2004/0253619; 2005/0027459; 2005/0123952; 2005/0130196 2005/0142581; 2005/0164215; 2005/0266397; 2005/0270191; 2006/0014154; 2006/0121520; 2006/0205040; 2006/0240412; 2006/0259249; 2006/0275749; 2006/0275788; 2007/0087336; 2007/0087337; 2007/0087338 2007/0087339; 2007/0087340; 2007/0087341; 2007/0184434; 2007/0218467; 2007/0218467; 2007/0218489; 2007/0224614; 2007/0238116; 2007/0243544; 2007/0248969; WO2002/070664; WO2003/001976; WO2003/100035; WO2004/009849; WO2004/052175; WO2004/053076; WO2004/053141; WO2004/053164; WO2004/060278; WO2004/093644; WO 2004/101809; WO2004/111187; WO2005/023083; WO2005/023986; WO2005/024046; WO2005/033271; WO2005/036369; WO2005/086634; WO2005/089128; WO2005/091971; WO2005/092059; WO2005/094421; WO2005/098047; WO2005/116263; WO2005/117270; WO2006/019784; WO2006/034294; WO2006/071241; WO2006/094238; WO2006/116127; WO2006/135400; WO2007/014045; WO2007/047778; WO2007/086904; and WO2007/100397; WO2007/118222, which are each incorporated by reference as if fully set forth herein.

Exemplary molecular mass-based analytical methods and other aspects of use in the sample processing units and systems described herein are also described in, e.g., Ecker et al. (2005) “The Microbial Rosetta Stone Database: A compilation of global and emerging infectious microorganisms and bioterrorist threat agents” BMC Microbiology 5(1):19; Ecker et al. (2006) “The Ibis T5000 Universal Biosensor: An Automated Platform for Pathogen Identification and Strain Typing” JALA 6(11):341-351.; Ecker et al. (2006) “Identification of Acinetobacter species and genotyping of Acinetobacter baumannii by multilocus PCR and mass spectrometry” J Clin Microbiol. 44(8):2921-32.; Ecker et al. (2005) “Rapid identification and strain-typing of respiratory pathogens for epidemic surveillance” Proc Natl Acad Sci USA. 102(22):8012-7; Hannis et al. (2008) “High-resolution genotyping of Campylobacter species by use of PCR and high-throughput mass spectrometry” J Clin Microbiol. 46(4):1220-5; Blyn et al. (2008) “Rapid detection and molecular serotyping of adenovirus by use of PCR followed by electrospray ionization mass spectrometry” J Clin Microbiol. 46(2):644-51; Sampath et al. (2007) “Global surveillance of emerging Influenza virus genotypes by mass spectrometry” PLoS ONE 2(5):e489; Sampath et al. (2007) “Rapid identification of emerging infectious agents using PCR and electrospray ionization mass spectrometry” Ann N Y Acad Sci. 1102:109-20; Hall et al. (2005) “Base composition analysis of human mitochondrial DNA using electrospray ionization mass spectrometry: a novel tool for the identification and differentiation of humans” Anal Biochem. 344(1):53-69; Hofstadler et al. (2003) “A highly efficient and automated method of purifying and desalting PCR products for analysis by electrospray ionization mass spectrometry” Anal Biochem. 316:50-57; Hofstadler et al. (2006) “Selective ion filtering by digital thresholding: A method to unwind complex ESI-mass spectra and eliminate signals from low molecular weight chemical noise” Anal Chem. 78(2):372-378.; and Hofstadler et al. (2005) “TIGER: The Universal Biosensor” Int J Mass Spectrom. 242(1):23-41, which are each incorporated by reference.

In addition to the molecular mass and base composition analyses referred to above, essentially any other nucleic acid amplification technological process is also optionally adapted for use in the systems of the invention. Other exemplary uses of the systems and other aspects of the invention include numerous biochemical assays, cell culture purification steps, and chemical synthesis, among many others. Many of these as well as other exemplary applications of use in the systems of the invention are also described in, e.g., Current Protocols in Molecular Biology, Volumes I, II, and III, 1997 (F. M. Ausubel ed.); Perbal, 1984, A Practical Guide to Molecular Cloning; the series, Methods in Enzymology (Academic Press, Inc.); Sambrook et al., 2001, Molecular Cloning: A Laboratory Manual, Third Edition, Cold Spring Harbor Laboratory Press, Cold Spring Harbor, N.Y.; Oligonucleotide Synthesis, 1984 (M. L. Gait ed.); Nucleic Acid Hybridization, 1985, (Hames and Higgins); Transcription and Translation, 1984 (Hames and Higgins eds.); Animal Cell Culture, 1986 (R. I. Freshney ed.); Berger and Kimmel, Guide to Molecular Cloning Techniques, Methods in Enzymology volume 152 Academic Press, Inc., San Diego, Calif. (Berger), DNA Cloning: A Practical Approach, Volumes I and II, 1985 (D. N. Glover ed.); Immobilized Cells and Enzymes, 1986 (IRL Press); Gene Transfer Vectors for Mammalian Cells, 1987 (J. H. Miller and M. P. Calos eds., Cold Spring Harbor Laboratory); and Methods in Enzymology Vol. 154 and Vol. 155 (Wu and Grossman, and Wu, eds., respectively), which are each incorporated by reference.

In some embodiments, one or more controllers and/or computers may be operably attached to devices of the present invention to select conditions under which molecular mass measurement are made using a device of the present invention. The controllers and/or computers configured to operate with devices described herein are generally configured to effect, e.g. temperature, sample volume, number of runs, sample switching, probe rinsing conditions, spray conditions, etc. Controllers and/or computers are typically operably connected to one or more system components, such as motors (e.g., via motor drives), thermal modulating components, detectors, motion sensors, fluidic handling components, robotic translocation devices, or the like, to control operation of these components. Controllers and/or other system components is/are generally coupled to an appropriately programmed processor, computer, digital device, or other logic device or information appliance (e.g., including an analog to digital or digital to analog converter as needed), which functions to instruct the operation of these instruments in accordance with preprogrammed or user input instructions (e.g., mixing mode selection, fluid volumes to be conveyed, etc.), receive data and information from these instruments, and interpret, manipulate and report this information to the user.

A controller or computer optionally includes a monitor which is often a cathode ray tube (“CRT”) display, a flat panel display (e.g., active matrix liquid crystal display, liquid crystal display, etc.), or others. Computer circuitry is often placed in a box, which includes numerous integrated circuit chips, such as a microprocessor, memory, interface circuits, and others. The box also optionally includes a hard disk drive, a floppy disk drive, a high capacity removable drive such as a writeable CD-ROM, and other common peripheral elements. Inputting devices such as a keyboard or mouse optionally provide for input from a user.

In some embodiments, a computer includes appropriate software for receiving user instructions, either in the form of user input into a set of parameter fields, e.g., in the form of preprogrammed instructions, e.g., preprogrammed for a variety of different specific operations. The software then converts these instructions to appropriate language for instructing the operation of one or more controllers to carry out the desired operation, e.g., rinsing probe, switching fluids, taking mass measurements, or the like. The computer then receives the data from, e.g., sensors/detectors included within the system, and interprets the data, either provides it in a user understood format, or uses that data to initiate further controller instructions, in accordance with the programming.

More specifically, the software utilized to control the operation of the devices and systems of the invention typically includes logic instructions that selectively direct, e.g., motors to more probes, rate of probe movement, rate of sampling, data acquisition, and the like. The logic instructions of the software are typically embodied on a computer readable medium, such as a CD-ROM, a floppy disk, a tape, a flash memory device or component, a system memory device or component, a hard drive, a data signal embodied in a carrier wave, and/or the like. Other computer readable media are known to persons of skill in the art. In some embodiments, the logic instructions are embodied in read-only memory (ROM) in a computer chip present in one or more system components, without the use of personal computers.

The computer can be, e.g., a PC (Intel x86 or Pentium chip-compatible DOS™ OS2™, WINDOWS™, WINDOWS NT™, WINDOWS98™, WINDOWS2000™, WINDOWS XP™ WINDOWS Vista™, LINUX-based machine, a MACINTOSH™, Power PC, or a UNIX-based (e.g., SUN™ work station) machine) or other common commercially available computer which is known to one of skill. Standard desktop applications such as word processing software (e.g., Microsoft Word™ or Corel WordPerfect™) and database software (e.g., spreadsheet software such as Microsoft Excel™, Corel Quattro Pro™, or database programs such as Microsoft Access™ or Paradox™) can be adapted to the present invention. Software for performing, e.g., sample processing unit container rotation, material conveyance to and/or from sample processing unit containers, mixing process monitoring, assay detection, and data deconvolution is optionally constructed by one of skill using a standard programming language such as Visual basic, C, C++, Fortran, Basic, Java, or the like.

Devices and systems of the invention may also include at least one robotic translocation or gripping component that is structured to grip and translocate fluids, containers, or other components between components of the devices or systems and/or between the devices or systems and other locations (e.g., other work stations, etc.). A variety of available robotic elements (robotic arms, movable platforms, etc.) can be used or modified for use with these systems, which robotic elements are typically operably connected to controllers that control their movement and other functions.

Devices, systems, components thereof, and station or system components of the present invention are optionally formed by various fabrication techniques or combinations of such techniques including, e.g., machining, embossing, extrusion, stamping, engraving, injection molding, cast molding, etching (e.g., electrochemical etching, etc.), or other techniques. These and other suitable fabrication techniques are generally known in the art and described in, e.g., Molinari et al. (Eds.), Metal Cutting and High Speed Machining, Kluwer Academic Publishers (2002), Altintas, Manufacturing Automation: Metal Cutting Mechanics, Machine Tool Vibrations, and CNC Design, Cambridge University Press (2000), Stephenson et al., Metal Cutting Theory and Practice, Marcel Dekker (1997), Fundamentals of Injection Molding, W. J. T. Associates (2000), Whelan, Injection Molding of Thermoplastics Materials, Vol. 2, Chapman & Hall (1991), Rosato, Injection Molding Handbook, 3^(rd) Ed., Kluwer Academic Publishers (2000), Fisher, Extrusion of Plastics, Halsted Press (1976), and Chung, Extrusion of Polymers: Theory and Practice, Hanser-Gardner Publications (2000), which are each incorporated by reference. Exemplary materials optionally used to fabricate devices or systems of the present invention, or components thereof include metal (e.g., steel, aluminum, etc.), glass, polymethylmethacrylate, polyethylene, polydimethylsiloxane, polyetheretherketone, polytetrafluoroethylene, polystyrene, polyvinylchloride, polypropylene, polysulfone, polymethylpentene, and polycarbonate, among many others. In certain embodiments, following fabrication, system components are optionally further processed, e.g., by coating surfaces with a hydrophilic coating, a hydrophobic coating (e.g., a Xylan 1010DF/870 Black coating available from Whitford Corporation (West Chester, Pa.), etc.), or the like, e.g., to prevent interactions between component surfaces and reagents, samples, or the like.

V. Lift and Mount Component

The present invention provides devices, apparatuses, and systems for lifting and mounting of clinical- and research-related equipment. In certain embodiments, for example, the present invention provides a lifting and mounting system for mass spectrometers (e.g., time of flight (TOF) mass spectrometers (MS)). In some embodiments, the present invention provides an apparatus, unit, assembly, system, rack, shelve, and/or device for mounting, storing, protecting, supporting, shelving, and/or holding a device, unit, apparatus, instrument, piece of equipment, etc. (e.g. mass spectrometers (e.g. TOF-MS, MALDI-TOF-MS, LC-MS, ESI-MS), chromatography equipment (e.g. high performance liquid chromatograph (HPLC), fast protein liquid chromatograph (FPLC), liquid chromatograph (LC), gas chromatograph (GC), supercritical-fluid chromatography (SFC), capillary electrokinetic chromatograph (CEC), etc.), scintillation counter, microscope systems (e.g. confocal microscope), spectrometer (e.g. IR spectrometer, UV-Vis. spectrometer, microwave spectrometer, x-ray spectrometer, emission spectrometer, fluorescence spectrometer, nuclear magnetic resonance spectrometer, etc.), x-ray generator, computers, etc.). Biomedical, biochemical, and biophysical research and clinical instruments may be large, unwieldy, and difficult to move and/or store. Further, research and clinical equipment may be delicate, containing precision elements that should be transported and stored with great care and sensitivity. In some embodiments, the present invention provides an apparatus for mounting, supporting, and storing clinical and research devices and equipment in a safe, effective manner. In some embodiments, an apparatus of the present invention is configured to support biomedical, biochemical, and/or biophysical devices and related equipment (e.g. computer, printer, reagents, power source, display unit, control unit, accessory units, etc.). In some embodiments, devices and equipment may be accessed by a user, manipulated, and used while stored in an apparatus of the present invention. In some embodiments, the present invention provides an apparatus for mounting, supporting, storing, and using a TOF-MS and any related equipment or accessories (e.g. computer, display, printer, reagents, nucleic acid or protein processing components (e.g., thermocyclers), etc.).

Illustrative embodiments of the apparatuses are described in more detail below. The invention is not limited to these particular embodiments.

As shown in FIG. 40, in some embodiments, the present invention provides an apparatus 100 for mounting and supporting a device 200 (exemplified as a TOF-MS in the figure). The apparatus provides a structural assembly 110 for supporting a device 200, and a mounting assembly 130 for mounting and unmounting the device 200 onto and off of the structural assembly 110.

In some embodiments, the apparatus 100 comprises a structural assembly 110. The structural assembly 110 comprises a plurality of support members (e.g. bars, rails, posts, beams, walls, etc.) including four vertical support members 111 (although more or less can be used), a front base member 112, a front support member 113, and two side support members 114 (one not within view in FIG. 40), a rear support member 115, rear restraint member 116, rear vertical member 117, two side restraint members 118 (one not within view in FIG. 40), two upper support members 119, and two top support members 120. The support members 120 provide support for the apparatus 100, the device 200, and the mounting assembly 130. Configurations of the support members other than the embodiments depicted in FIG. 40 are also contemplated. For example, additional side restraint members 118 and rear restraint members 116 may be utilized to provide additional support and restraint for the device 200, multiple rear vertical members 117, or additional top support members 120 may play roles in attaching and supporting the mounting assembly 130. Likewise, one or more of the support or restraint members may be absent, so long as sufficient architecture is present to mount the device 200. Attached to the side support members 114, rear support member 115, and front support member 113 is a platform member 121 which provides a placement location for the device 200, when mounted.

In some embodiments, the apparatus 100 comprises a mounting assembly 130. The mounting assembly 130 is configured to perform a lifting operation and a retracting operation. The lifting operation of the mounting assembly 130 is performed by two device engagement members 131, a device stability member 132, a primary lift rod 133, a secondary lift rod 134, four rod engagement members 135, a rod connection member 136, a lift motor 137 (e.g., a stepper motor, a servo motor, or the like), two side lift members 138, a front lift member 139, and a top lift member 140. In some embodiments, device engagement members 131 comprise straps or belts which extend from a rod engagement member 135 attached to the primary lift rod 133 to a second rod engagement member 135 attached to the secondary lift rod 134. The device engagement members 131 are configured to extend to the level of the front base member 112 and beneath the device 200. In some embodiments, rod engagement members 135 comprise wheels or tracks on the primary lift rod 133 and secondary lift rod 134 which are configured to engage the device engagement members and provide stability of the interaction between the device engagement members 131 and the primary lift rod 133 and secondary lift rod 134 during lifting. In some embodiments, the lift motor 137 is functionally attached to the primary lift rod 133. Turning of the lift motor 137 results in simultaneous turning of the primary lift rod 133. The rod connection member 136 engages both the primary lift rod 135 and the secondary lift rod 134. Turning of the primary lift rod 133 results in turning of the secondary lift rod 134 through the action of the rod connection member 136. Therefore, turning of the lift motor 137 results in the simultaneous turning of the primary lift rod 133 and the secondary lift rod 134 in the same rotary direction. Turning of the primary lift rod 133 and secondary lift rod 134 causes the device engagement members 131 to retract, thereby lifting the device 200 up from the level of the front base member 112. The lift motor 137, primary lift rod 133, secondary lift rod 134, rod engagement members 135, rod connection member 136, and device engagement members 131 are configured to lift the device 200 so that the bottom of the device 200 is higher than the level of the platform member 121. One or more device stability members 132 extend around the device 200 and the device engagement members 131 to stabilize and secure the device 200 during lifting. Support for the mounting assembly 130 during lifting is provided by two side lift members 138, a front lift member 139, and a top lift member 140.

In some embodiments, the retracting operation of the mounting assembly 130 is performed by a retraction member 141 and the retraction motor 142 (e.g., a stepper motor, a servo motor, or the like). Movement of the retraction member 141 by the retraction motor 142 results in the retraction of the primary lift rod 134 and secondary lift rod 134, as well as the attached rod engagement members 135, device engagement members 131, device stability member 132, rod connection member 136, and lift motor 137 into the mounted position above the platform member 121.

Upon retraction, the mounting assemble 130 is configured to lower the device 200 onto the platform assembly 118. Lowering of the device 200 is carried out by turning of the lift motor 137 in the opposite direction as during lifting. Turning of the lift motor 137 results in rotation of the primary lift rod 133, movement of the rod connection member 136, rotation of the secondary lift member 134, extension of the device engagement members 131, and lowering of the device 200 onto the platform member 118. Upon placement of the device 200 onto the platform member 121, the side lift members 138 and front lift member 139 can be removed or retracted, and the top lift member 140 can adopt a collapsed conformation (SEE FIG. 41). The same lowering mechanism is performed when the mounting assembly 130 is in the extended conformation to lower a device 200 onto the ground in front of the apparatus 100. In some embodiments, additional support structures are included to increase the load bearing capacity of the side lift members 138 and the front lift member 139. For example, in some embodiments, one or more additional support members, straps, cables, or other components connect the front lift member 139 and/or the side lift members 138 (or any other component of the mounting assembly 130) to the structural assembly 110, for example, to the support members 120 of the structural assembly 110.

In some embodiments, the apparatus 100 comprises an accessory assembly 150. In some embodiments the accessory assembly 150 attaches to the structural assembly 110 at the front base member 112, vertical support members 111, rear restraint member 116, side restraint member 118, front support member 113, and rear restraint member 116. The accessory assembly 150 comprises the front base member 112, front support member 113, accessory vertical member 151, accessory side restraint 152, accessory support members 153, accessory side support 154, accessory vertical support 155, accessory base member 156, and accessory top restraint 157. Many configurations of the accessory assembly 150 are within the scope of the present invention. For example, in some embodiments the accessory assembly 150 comprises front and rear accessory top restraints 157. In some embodiments, the accessory assembly 150 comprises a rear accessory base member. In some embodiments, the accessory assembly 150 lacks an accessory side restraint 152 and accessory top restraint 157. In some embodiments, the apparatus 100 lacks an accessory assembly 150. In some embodiments, the apparatus 100 comprises multiple accessory assemblies 150 (e.g. located in front, right side, left side, rear, serially connected, etc.).

In some embodiments, the mounting assembly 130 comprises a lifting assembly and a retracting assembly. In some embodiments, the lifting assembly and a retracting assembly comprise separate motors (e.g. 137 and 142). In some embodiments, a single motor drives the lifting assembly and the retracting assembly (e.g. 137). In some embodiments, a motor engages both the retracting assembly and the lifting assembly. In some embodiments, the lifting assembly is driven by a motor (e.g. 137). In some embodiments, the lifting motor is electric powered (e.g. AC powered, battery powered, etc.). In some embodiments, the lifting motor powers the lifting assembly by directly turning one or more gears, chains, belts, rods (e.g. 133), etc. In some embodiments, the lifting motor (e.g. 137) powers the lifting assembly by indirectly turning one or more gears, chains, belts, rods (e.g. 134), etc. In some embodiments, one or more gears or rods (e.g. 133 or 134) turned by the lifting motor (e.g. 137) directly engage one or more device engagement members (e.g. 131). In some embodiments, one or more gears or rods (e.g. 133 or 134) turned by the lifting motor (e.g. 137) indirectly engage one or more device engagement members (e.g. through a chain, through a belt, through one or more gears, through a rod engagement member (e.g. 135), etc.). In some embodiments, a lifting motor (e.g. 137) directly turns a primary lift rod (e.g. 133), and indirectly (e.g. via a chain, via one or more gears, etc.) turns a secondary lifting rod (e.g. 134). In some embodiments, a primary (e.g. 133) and/or secondary lift rod (e.g. 134) is functionally attached to one or more device engagement members (e.g. 131). In some embodiments, a lifting motor turns a primary lift rod (e.g. 133) and a secondary lift rod (e.g. 134) in the same direction (e.g. clockwise or counterclockwise). In some embodiments, a lifting motor turns a primary lift rod (e.g. 133) and a secondary lift rod (e.g. 134) in opposite directions (e.g. clockwise and counterclockwise). In some embodiments, turning of a primary lift rod (e.g. 133) and/or a secondary lift rod (e.g. 134) and/or the rod engagement members (e.g. 135) results in retracting of one or more device engagement members (e.g. 131). In some embodiments, device engagement members (e.g. 131) comprise straps, cords, chains, cables, ropes, latches, hooks, etc. In some embodiments device engagement members (e.g. 131) are positioned under a device (e.g. 200) in order to lift the device (e.g. 200). In some embodiments device engagement members (e.g. 131) are attached to a device (e.g. 200) in order to lift the device (e.g. 200). In some embodiments device engagement members (e.g. 131) are configured to fit with a specific make, model, or type of device (e.g. 200). In some embodiments, device engagement members (e.g. 131) are generically configured to fit with all, most, or many large research or clinical devices (e.g. 200). In some embodiments, retracting one or more device engagement members (e.g. 131) via the lifting assembly results in lifting an attached or engaged device (e.g. 200).

In some embodiments, the retracting assembly is operatively associated, functionally associated, and/or attached to the lifting assembly. In some embodiments, the retracting assembly is configured to shuttle the lifting assembly from an extended conformation (SEE FIG. 40) (e.g. extended beyond the front or rear of the structural assembly 110) to a retracted conformation (SEE FIG. 41) (e.g. retracted within the structural assembly 110, above the platform member 121). In some embodiments, the retracting assembly is configured to shuttle the lifting assembly from a retracted conformation (SEE FIG. 41) to an extended conformation (SEE FIG. 40). In some embodiments, the retracting assembly is powered by a motor (e.g. electric motor). In some embodiments, the retracting assembly is powered by the same motor as the lifting assembly. In some embodiments, the retracting assembly is powered by a different motor from the lifting assembly (e.g. 142). In some embodiments, the retracting motor (e.g. 142) turns one or more gears, rods, belts, and/or chains (e.g. retraction member 141) which result in extending or retracting the lifting assembly.

The present invention is not limited to the configurations depicted in the drawings (SEE FIG. 40-44). In some embodiments, the structural assembly 110 may be of any suitable configuration. In some embodiments, the structural assembly 110 comprises walls, windows, doors, drawers, shelves, panels, etc. In some embodiments, the structural assembly 110 comprises wheels, casters, sliders, etc. In some embodiments, the structural assembly 110 is mobile. In some embodiments, the structural assembly 110 is stationary. In some embodiments, the structural assembly 110 is configured to be attached to a wall or external support. In some embodiments, the structural assembly 110 is free standing.

In some embodiments, the structural assembly 110 comprises one or more vertical support members 111 (e.g. 1, 2 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 13, 14, 15, 16, 17 18, 19, 20, >20). In some embodiments, vertical support members 111 are located at the corners of the structural assembly 110. In some embodiments vertical support members 111 are located along the front, right, left, or rear sides of the structural assembly 110. In some embodiments, vertical support members 111 extend from the bottom of the structural assembly 110 to the top of the structural assembly 110. In some embodiments, vertical support members 111 do not extend to the bottom of the structural assembly 110. In some embodiments, vertical support members 111 do not extend to the top of the structural assembly 110. In some embodiments, vertical support members 111 are attached to or in contact with other elements within the structural assembly 110 (e.g. front base member 112, front support member 113, side support member 114, rear support member 115, rear restraint member 116, side restraint member 118, upper support member 119, top support member 120, platform member 121, etc.), mounting assembly 130 (e.g. primary lift rod 133, secondary lift rod 134, lift motor 137, side lift member 138, front lift member 139, top lift member 140, retraction member 141, retraction motor 142, etc.), and/or accessory assembly 150 (e.g. accessory vertical member 151, accessory side restraint 152, accessory support member 153, accessory side support 154, accessory vertical support 155, accessory base member 156, accessory top restraint 157, etc.). In some embodiments, vertical support members 111 are attached to or in contact with other elements within the structural assembly 110, mounting assembly 130, and/or accessory assembly 150 through connector pieces (e.g. brackets, joints, connectors, screws, etc.).

In some embodiments, the structural assembly 110 comprises one or more front base members 112 (e.g. 1, 2 3, 4, 5, 6, 7, 8, 9, 10, >10). In some embodiments, a front base member 112 is positioned along the front of the apparatus 100. In some embodiments, a front base member 112 is positioned along the right, rear, or left side of the structural assembly 110. In some embodiments, a front base member comprises a portion of the structural assembly 110 and/or the accessory assembly 150. In some embodiments, a front base member extends from a corner of the structural assembly 110 and/or the accessory assembly 150 to another corner. In some embodiments, one or both ends of a front base member terminates within the side of the structural assembly 110 and/or the accessory assembly 150 (e.g. not at a corner). In some embodiments, one or more front base members 112 are attached to or in contact with other elements within the structural assembly 110 (e.g. vertical support member 111 side support member 114, rear support member 115, rear vertical member 117, platform member 121, etc.), mounting assembly 130, and/or accessory assembly 150 (e.g. accessory vertical member 151, accessory side restraint 152, accessory support member 153, accessory side support 154, accessory vertical support 155, accessory base member 156, accessory top restraint 157, etc.) through direct interaction of through connector pieces (e.g. brackets, joints, connectors, screws, etc.).

In some embodiments, the structural assembly 110 comprises one or more front support members 113 (e.g. 1, 2 3, 4, 5, 6, 7, 8, 9, 10, >10), side support members 114 (e.g. 1, 2 3, 4, 5, 6, 7, 8, 9, 10, >10), and/or rear support members 115 (e.g. 1, 2 3, 4, 5, 6, 7, 8, 9, 10, >10). In some embodiments, a front support member 113 is positioned along the front of the apparatus 100. In some embodiments, a side support member 114 is positioned along the right or left side of the apparatus 100. In some embodiments, a rear support member 115 is positioned along the rear of the apparatus 100. In some embodiments, a front support member 113, side support member 114, and/or rear support member 115 is positioned along the front, right, rear, and/or left side of the structural assembly 110. In some embodiments, a front support member 113, side support member 114, and/or rear support member 115 comprises a portion of the structural assembly 110 and/or the accessory assembly 150. In some embodiments, a front support member 113, side support member 114, and/or rear support member 115 extends from a corner of the structural assembly 110 and/or the accessory assembly 150 to another corner. In some embodiments, one or both ends of a front support member 113, side support member 114, and/or rear support member 115 terminates within the side of the structural assembly 110 and/or the accessory assembly 150 (e.g. not at a corner). In some embodiments, one or more front support member 113, side support member 114, and/or rear support member 115 are attached to or in contact with other elements within the structural assembly 110 (e.g. vertical support member 111, rear vertical member 117, platform member 121, etc.), mounting assembly 130, and/or accessory assembly 150 (e.g. accessory vertical member 151, accessory side restraint 152, accessory support member 153, accessory side support 154, accessory vertical support 155, accessory base member 156, accessory top restraint 157, etc.) through direct interaction of through connector pieces (e.g. brackets, joints, connectors, screws, etc.). In some embodiments, one or more front support member 113, side support member 114, and/or rear support member 115 are attached to or in contact with (e.g. direct or through one or more connector pieces) one or more front support member 113, side support member 114, and/or rear support member 115.

In some embodiments, the apparatus 100 comprises one or more rear restraint members 116 (e.g. 1, 2 3, 4, 5, 6, 7, 8, 9, 10, >10), side restraint members 118 (e.g. 1, 2 3, 4, 5, 6, 7, 8, 9, 10, >10), accessory side restraints 152 (e.g. 1, 2 3, 4, 5, 6, 7, 8, 9, 10, >10), and/or accessory top restraints 157 (e.g. 1, 2 3, 4, 5, 6, 7, 8, 9, 10, >10). In some embodiments, one or more rear restraint members 116, side restraint members 118, accessory side restraints 152, and/or accessory top restraints 157 are configured to provide structural support for the apparatus 100 and/or device 200. In some embodiments, one or more rear restraint members 116, side restraint members 118, accessory side restraints 152, and/or accessory top restraints 157 are configured to restrain a device 100 and/or accessory equipment, and prevent a device 100 and/or accessory equipment from falling, slipping, dislodging, and/or shifting. In some embodiments, one or more rear restraint members 116, side restraint members 118, accessory side restraints 152, and/or accessory top restraints 157 extend from a corner of the structural assembly 110 and/or the accessory assembly 150 to another corner. In some embodiments, one or more rear restraint members 116, side restraint members 118, accessory side restraints 152, and/or accessory top restraints 157 terminates within the side of the structural assembly 110 and/or the accessory assembly 150 (e.g. not at a corner). In some embodiments, one or more rear restraint members 116, side restraint members 118, accessory side restraints 152, and/or accessory top restraints 157 comprise a linear element, corner element, and/or bent element. In some embodiments, one or more rear restraint members 116, side restraint members 118, accessory side restraints 152, and/or accessory top restraints 157 are attached to or in contact with (e.g. direct or through one or more connector pieces) one or more elements within the structural assembly 110 (e.g. vertical support member 111, rear vertical member 117, platform member 121, etc.), mounting assembly 130, and/or accessory assembly 150 (e.g. accessory vertical member 151, accessory side restraint 152, accessory support member 153, accessory side support 154, accessory vertical support 155, accessory base member 156, accessory top restraint 157, etc.).

In some embodiments, the structural assembly 110 comprises one or more rear vertical members 117 (e.g. 1, 2 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 13, 14, 15, 16, 17 18, 19, 20, >20). In some embodiments, rear vertical members 117 are located at the corners of the structural assembly 110. In some embodiments rear vertical members 117 are located along the front, right, left, or rear sides of the structural assembly 110. In some embodiments, rear vertical members 117 extend from the bottom of the structural assembly 110 to the top of the structural assembly 110. In some embodiments, rear vertical members 117 do not extend to the bottom of the structural assembly 110. In some embodiments, rear vertical members 117 do not extend to the top of the structural assembly 110. In some embodiments, rear vertical members 117 are attached to or in contact with other elements within the structural assembly 110 (e.g. front base member 112, front support member 113, side support member 114, rear support member 115, rear restraint member 116, side restraint member 118, upper support member 119, top support member 120, platform member 121, etc.), mounting assembly 130 (e.g. primary lift rod 133, secondary lift rod 134, lift motor 137, side lift member 138, front lift member 139, top lift member 140, retraction member 141, retraction motor 142, etc.), and/or accessory assembly 150 (e.g. accessory vertical member 151, accessory side restraint 152, accessory support member 153, accessory side support 154, accessory vertical support 155, accessory base member 156, accessory top restraint 157, etc.). In some embodiments, rear vertical members 117 are attached to or in contact with other elements within the structural assembly 110, mounting assembly 130, and/or accessory assembly 150 through connector pieces (e.g. brackets, joints, connectors, screws, etc.).

In some embodiments, the apparatus 100 of the present invention provides one or more platform members 121 (e.g. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, >10). In some embodiments, a platform member of the present invention is part of the structural assembly 110, mounting assembly 130, accessory assembly 150, and/or bridges 2 or more portions of the apparatus 100 (e.g. structural assembly 110 and accessory assembly 150). In some embodiments, a platform assembly 121 is configured to support a device 100, accessory, or other equipment, devices, apparatus, etc. In some embodiments, a platform assembly 121 is custom designed to fit and/or interact with a specific device 100 (e.g. mass spectrometer (e.g. TOF-MS)). In some embodiments, a platform assembly 121 comprises attachment elements for interacting with a device 100. In some embodiments, a platform assembly 121 provides a generic platform for supporting and interacting with general clinical and research equipment. In some embodiments, a platform assembly is directly or indirectly supported by vertical support members 111, front base members 112, front support members 113, side support members 114, rear support members 115, rear vertical members 117, accessory vertical members 151, accessory support members 153, accessory side supports 154, accessory vertical supports 155, and/or accessory base members 156.

In some embodiments, one or more accessory vertical members 151, accessory support member 153, accessory side support 154, accessory vertical support 155, and/or accessory base member 156 are configured to provide similar functions to the corresponding elements in the structural assembly 110. The accessory elements are configured to support the accessory assembly 150 and any accessory devices, equipment, and/or accessory units. In some embodiments, an apparatus 100 comprises one or more accessory assemblies 150 located on the front, rear, right, or left sides of the structural assembly 110. In some embodiments, an apparatus 100 lacks an accessory assembly 150.

In some embodiments, the mounting assembly 130 comprises one or more device engagement members 131 (e.g. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 13, 14, 15, 16, 17 18, 19, 20, >20). In some embodiments, device engagement members 131 provide an interface between the mounting assembly 130 and the device 200, during the lifting, retracting, and lowering processes. In some embodiments, a device engagement member 131 comprises a strap, belt, cord, cable, latch, platform, scoop, elevator, arm, etc. In some embodiments, a device engagement member 131 attaches directly to a device 200 (e.g. to the exterior). In some embodiments, a device engagement member 131 traverses around, under, or through a device 200.

In some embodiments, the structural assembly, mounting assembly, and accessory assembly comprise a plurality of materials (e.g. metal, alloys, plastics, etc.). In some embodiments, an apparatus of the present invention comprises one or more metals, alloys, plastics, polymers, natural materials, synthetic materials, fabrics, fibers, etc. In some embodiments, an apparatus of the present invention comprises one or more metals including but not limited to aluminum, antimony, boron, cadmium, cesium, chromium, cobalt, copper, gold, iron, lead, lithium, manganese, mercury, molybdenum, nickel, platinum, palladium, rhodium, silver, tin, titanium, tungsten, vanadium, and zinc. In some embodiments, a device of the present invention comprises one or more alloys including but not limited to alloys of aluminum (e.g., Al—Li, alumel, duralumin, magnox, zamak, etc.), alloys of iron (e.g., steel, stainless steel, surgical stainless steel, silicon steel, tool steel, cast iron, Spiegeleisen, etc.), alloys of cobalt (e.g., stellite, talonite, etc.), alloys of nickel (e.g., German silver, chromel, mu-metal, monel metal, nichrome, nicrosil, nisil, nitinol, etc.), alloys of copper (beryllium copper, billon, brass, bronze, phosphor bronze, constantan, cupronickel, bell metal, Devarda's alloy, gilding metal, nickel silver, nordic gold, prince's metal, tumbaga, etc.), alloys of silver (e.g., sterling silver, etc.), alloys of tin (e.g., Britannium, pewter, solder, etc.), alloys of gold (electrum, white gold, etc.), amalgam, and alloys of lead (e.g., solder, terne, type meta, etc.). In some embodiments, a device of the present invention comprises one or more plastics including but not limited to Bakelite, neoprene, nylon, PVC, polystyrene, polyacrylonitrile, PVB, silicone, rubber, polyamide, synthetic rubber, vulcanized rubber, acrylic, polyethylene, polypropylene, polyethylene terephthalate, polytetrafluoroethylene, gore-tex, polycarbonate, etc. In some embodiments, elements of a device of the present invention a device of the present invention may also comprise glass, textiles (e.g., from animal (e.g. wool), plant (e.g. cotton, flax, etc.), mineral, and/or synthetic sources (e.g. polyester, etc.), liquids, etc.

VI. Asprirate Needle

In some embodiments, the present invention provides aspirate needles for use in the systems and methods described in this application that avoid problems associated with operating in magnetic environments. In certain embodiments, one or more aspirate needles in the systems of the present invention are composed of polyetheretherketone tubing (e.g., PEEK tubing), or similar type tubing, in conjunction with a stainless steel over-sheath that does not extend to the end of the tubing (see, e.g., FIG. 51), although any suitable non-magnetizable material may be used. The tubing is, for example, guided and held straight by the over sheath of stainless steel tubing for its near-full length (e.g., except the last few mm). Only the plastic tubing touches the aspirate fluid. In certain embodiments, there are no internal fluid connection junctions with the tubing employed. In some embodiments, the assembly shown in FIG. 51 is spring-loaded (spring inside the white Delrin hub) for +/−1 mm of height tolerance, as the probe touches off on the bottom of the cylindrical cuvette. In certain embodiments, the size of the tube is about 1/16″ OD.

Work conducted during development of embodiments of the present invention, found the configuration described above overcame problems found when employing a stainless steel needle, which saw magnetic particle build-up at the tip over time, due to induced magnetism. This was caused by the fact that the probe is operating in a highly magnetic field in certain embodiments (e.g., see the nickel-plated neodymium magnets on either side of the cuvette in FIG. 51). It was determined that cutting and polishing the stainless tip, created some slight magnetic properties, which was enough to be generate problems after aspirating 5000 or more wells. The aspirate needle embodiments discussed above, and shown in FIG. 51, overcome such limitations.

VII. Reagent Rack and Signal Light

In some embodiments, the present invention provides systems for bioagent detection that comprise a reagent rack that can be accessed from the front on an intergrated system, although any suitable location may be employed. In some preferred embodiments, the rack is removable or partially removable from the remainder of the system to facility exchange of reagent containers. For example, as shown in FIG. 52 the rack containing the reagent bottles can be swung forward into a loading position. The reagent rack can also then be swung back into a run position as shown in FIG. 53.

In certain embodiments, the integrated detection system (shown in FIGS. 52 and 53) has a signal light or audio alarm (e.g., located on top of the integrated system as shown in FIGS. 52 and 53). In particular embodiments, this signal light or audio alarm is configured to alert the user of the integrated system that, for example, one or more of the reagent bottles is low or empty (or could simply indicate good status of all reagents), or could indicate that the integrated system was experiencing some internal problem that required user attention. In certain embodiments, the signal light has one color (e.g., blue) that indicates that all systems are working properly and/or all reagent bottles are not low; has a second color (e.g., amber) that indicates that there is a minor problem or that one or more of the reagent bottles is getting low; and has a third color (e.g., red) to indicate a system stopping problem or that one of the reagents bottles is empty. In some embodiments, a light or other indicator on the outside (e.g., top) of the system housing indicates a problem or potential problem. A secondary set of signals (e.g., lights) is contained under the reagent bottles themselves indicating which of the bottles has in inappropriate volume or other problem. Thus, the first external alarm indicates a general problem and the bottle-specific lights indicate more specifically where the problem resides. The volume of the reagent vessels can be assessed via any desired capacitive level sensing component or method, including visual methods, weight, or the like.

FIG. 54 shows one embodiments of the signal light of the present invention. FIG. 54A shows the signal light with the translucent cover covering LED lights. FIG. 54B shows the cover removed from the light, showing the internal LED light system. FIG. 54C shows a close up view of the LED light system, which is composed of 3 roes of 120 degree angle LED's (blue, red, and amber) which has variable intensity for each. In certain embodiments, the signal light is configured to display 3 colors (e.g., red, blue and amber), with intensity controlled by a PCB circuit, which is a USB peripheral for the intergrated system. In certain embodiments, the signal light has the dimensions such as, fore example, 6″×9″×4″ tall.

VIII. Reagent Level Sensing Component

In certain embodiments, the integrated systems of the present invention have a plurality of liquid reagent bottles. In particular embodiments, the integrated system is configured to light up the reagent bottles with a color that is indicative of its liquid level status (e.g., empty is one color, low is a second color, and acceptable or full is a third color). In this regard, a user does not have to examine the individual reagent bottles to determine the status of each bottle.

In certain embodiments, the user is alerted to the status of reagent bottles by placing Light Emitting Diodes (LEDs) below PolyEthyleneGlycol-bottles or any material bottle (e.g., as shown in FIG. 55B). The status of the system or functional unit is communicated via the LEDs causing the bottle to illuminate with color or sequence of flashes. The illuminated bottle therefore indicates status. FIG. 55A shows three bottles, with two of the bottle (left and right) being one color to indicate an acceptable reagent level, and the middle bottle being a different color indicating a low level of reagent in this bottle.

In some embodiments, the presence or fill-status of the reagent bottles is detected by capacitive level sensing (or any other method that can sense reagent level or weight). In particular embodiments, according to sequences or combinations programmed as a user may decide, two individual banks of hi-brite LEDs (e.g., blue and amber) are available to be illuminated. In particular embodiments, the sensor is “normally open,” so that the presence of at least some acceptable level of reagent is required to confirm the bottle is in place. Selective pattern diffusers on the LED window are used to highlight the meniscus.

In some embodiments, the “waste bottle full” sensor is “normally closed,” so if a wire is broken, the logic state is the same as if the bottle is full. A second reflective IR sensor may be used to detect that the waste bottle is physically present. The “bottle present” sensor may have a short detection range (approx. 1″), to prevent false triggering on other objects.

In certain embodiments, the LED's, directly mounted to the sensor control-interface PCB are housed in a spill-proof area below the bottles. In particular embodiments, the LED's are standard commercial size, readily available, and dissipate approximately ½ watt per station for each color.

While the foregoing invention has been described in some detail for purposes of clarity and understanding, it will be clear to one skilled in the art from a reading of this disclosure that various changes in form and detail can be made without departing from the true scope of the invention. For example, all the techniques and apparatus described above can be used in various combinations. All publications, patents, patent applications, and/or other documents cited in this application are incorporated by reference in their entirety for all purposes to the same extent as if each individual publication, patent, patent application, and/or other document were individually indicated to be incorporated by reference for all purposes. 

We claim:
 1. A system, comprising: at least one sample container handling component that comprises at least one non-priority sample container storage unit and at least one priority sample container storage unit that each store at least one sample container that is configured to contain one or more samples; at least one mixing station that comprises at least one mixing container and at least one mixing mechanism that is configured to mix at least one composition comprising magnetically responsive particles disposed in the mixing container; at least one sample processing component that comprises: at least one sample processing unit that comprises: at least one sample processing vessel that is configured to contain at least one sample comprising at least one magnetically responsive particle; at least one magnet that generates, or is configured to generate, at least one magnetic field at least proximal to the sample processing vessel; and at least one carrier mechanism operably connected to the sample processing unit, which carrier mechanism is configured to move the sample processing unit to one or more locations; at least one detection component that is configured to detect at least one detectable property of at least one sample component; at least one material transfer component that is configured to transfer material to and/or from the sample container handling component, the mixing station, the sample processing component, and/or the detection component; and, at least one controller operably connected to, and configured to effect operation of, the sample container handling component, the mixing station, the sample processing component, and/or the detection component. 